# RhymeZone API

> RhymeZone returns rhymes and related words as a workflow and API.

RhymeZone finds perfect rhymes, near rhymes, or similar-sounding words for an input word, with syllable counts when available. Get related words finds similar meanings, opposites, describing adjectives, or associated words for an input word or short phrase.

- Page: https://fous.com/tools/rhymezone
- Handle: `@rhymezone`
- Category: [Education](https://fous.com/tools/category/education)
- Source website: https://rhymezone.com
- Last verified: Sep 29, 2026

## Methods

### Get related words

Operation `get_related_words`, version 1. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.

Find words with similar meanings, opposite meanings, adjectives describing a word, or strongly associated words. Results are ordered by relevance; some entries may not have a score or part of speech.

**Input**

| Field | Type | Required | Example | Description |
|---|---|---|---|---|
| `word` | string | yes | `"fast"` | A word or short phrase to find related words for, such as ocean or fast car. |
| `relation` | string | no | `"opposite_meaning"` | Which relation to look for, such as adjectives_for. |
| `max_results` | integer | no | `3` | Maximum number of words to return, such as 50. |

**Input schema**

```json
{
  "type": "object",
  "required": [
    "word"
  ],
  "properties": {
    "word": {
      "type": "string",
      "minLength": 1,
      "description": "A word or short phrase to find related words for, such as ocean or fast car.",
      "examples": [
        "fast",
        "ocean",
        "fast car"
      ]
    },
    "relation": {
      "enum": [
        "similar_meaning",
        "opposite_meaning",
        "adjectives_for",
        "associated_with"
      ],
      "type": "string",
      "default": "similar_meaning",
      "description": "Which relation to look for, such as adjectives_for.",
      "examples": [
        "opposite_meaning",
        "adjectives_for",
        "associated_with"
      ]
    },
    "max_results": {
      "type": "integer",
      "default": 50,
      "maximum": 300,
      "minimum": 1,
      "description": "Maximum number of words to return, such as 50.",
      "x-fous-developer": true,
      "examples": [
        3,
        5
      ]
    }
  },
  "additionalProperties": false,
  "examples": [
    {
      "word": "fast",
      "relation": "opposite_meaning",
      "max_results": 3
    },
    {
      "word": "ocean"
    },
    {
      "word": "ocean",
      "relation": "adjectives_for",
      "max_results": 5
    }
  ]
}
```

**Output**

| Field | Type | Example | Description |
|---|---|---|---|
| `related_words` | array |  | Related words in relevance order. |
| `related_words[].word` | string | `"slow"` | Related word or phrase. |
| `related_words[].page_url` | string | `"https://www.rhymezone.com/r/d=slow"` | RhymeZone page for this word or phrase. |
| `related_words[].part_of_speech` | string or null | `"adjective, verb, noun, adverb"` | Known parts of speech, or null when unavailable. |
| `related_words[].relevance_score` | number or null | `14045` | Source relevance score when provided; its scale varies by relation. |

**Example input**

```json
{
  "word": "fast",
  "relation": "opposite_meaning",
  "max_results": 3
}
```

**Example output**

```json
{
  "related_words": [
    {
      "word": "slow",
      "page_url": "https://www.rhymezone.com/r/d=slow",
      "part_of_speech": "adjective, verb, noun, adverb",
      "relevance_score": 14045
    }
  ]
}
```

### Get rhymes

Operation `get_rhymes`, version 1. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.

Find perfect rhymes, near rhymes, or similar-sounding words on RhymeZone, with syllable counts. Relevance scores may be unavailable for some matches.

**Input**

| Field | Type | Required | Example | Description |
|---|---|---|---|---|
| `kind` | string | no | `"perfect"` | Type of match, for example near. |
| `word` | string | yes | `"orange"` | Word to rhyme, for example love. |
| `max_results` | integer | no | `50` | Maximum matches to return, for example 50. |

**Input schema**

```json
{
  "type": "object",
  "required": [
    "word"
  ],
  "properties": {
    "kind": {
      "enum": [
        "perfect",
        "near",
        "sounds_like"
      ],
      "type": "string",
      "default": "perfect",
      "description": "Type of match, for example near.",
      "examples": [
        "perfect",
        "near",
        "sounds_like"
      ]
    },
    "word": {
      "type": "string",
      "minLength": 1,
      "description": "Word to rhyme, for example love.",
      "examples": [
        "orange",
        "love",
        "zzqxvplmn"
      ]
    },
    "max_results": {
      "type": "integer",
      "default": 50,
      "maximum": 300,
      "minimum": 1,
      "description": "Maximum matches to return, for example 50.",
      "x-fous-developer": true,
      "examples": [
        50,
        10,
        5
      ]
    }
  },
  "additionalProperties": false,
  "examples": [
    {
      "kind": "perfect",
      "word": "orange",
      "max_results": 50
    },
    {
      "word": "love"
    },
    {
      "kind": "near",
      "word": "orange",
      "max_results": 10
    }
  ]
}
```

**Output**

| Field | Type | Example | Description |
|---|---|---|---|
| `rhymes` | array |  | Matching words in RhymeZone relevance order. |
| `rhymes[].word` | string | `"gorringe"` | Matching word or phrase. |
| `rhymes[].page_url` | string | `"https://www.rhymezone.com/r/d=gorringe"` | RhymeZone page for this word. |
| `rhymes[].syllables` | integer or null | `2` | Number of syllables, when available. |
| `rhymes[].relevance_score` | integer or null | `100` | RhymeZone relevance score, when available. |

**Example input**

```json
{
  "kind": "perfect",
  "word": "orange",
  "max_results": 50
}
```

**Example output**

```json
{
  "rhymes": [
    {
      "word": "gorringe",
      "page_url": "https://www.rhymezone.com/r/d=gorringe",
      "syllables": 2,
      "relevance_score": 100
    },
    {
      "word": "sporange",
      "page_url": "https://www.rhymezone.com/r/d=sporange",
      "syllables": 2,
      "relevance_score": 100
    },
    {
      "word": "oranje",
      "page_url": "https://www.rhymezone.com/r/d=oranje",
      "syllables": 2,
      "relevance_score": null
    }
  ]
}
```

## Quick start

Replace `YOUR_API_KEY` with a Fous API key. To create one, open Developers at the bottom of Fous Studio, turn on Developer mode, then go to API keys (https://app.fous.com/keys). Change the values in `input` to run the same tool on new data.

```bash
curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 180 \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "api": "@rhymezone",
  "visibility": "public",
  "operation": "get_related_words",
  "version": 1,
  "input": {
    "word": "fast",
    "relation": "opposite_meaning",
    "max_results": 3
  },
  "response": {
    "format": "json"
  }
}'
```

```python
# Save as fous.py and run with python3 fous.py. No packages needed.
import json
import urllib.error
import urllib.request

api_key = "YOUR_API_KEY"

body = json.loads("{\n  \"api\": \"@rhymezone\",\n  \"visibility\": \"public\",\n  \"operation\": \"get_related_words\",\n  \"version\": 1,\n  \"input\": {\n    \"word\": \"fast\",\n    \"relation\": \"opposite_meaning\",\n    \"max_results\": 3\n  },\n  \"response\": {\n    \"format\": \"json\"\n  }\n}")
request = urllib.request.Request(
    "https://api.fous.com/v1/query",
    data=json.dumps(body).encode("utf-8"),
    headers={
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json",
    },
    method="POST",
)
try:
    with urllib.request.urlopen(request, timeout=180) as response:
        result = json.load(response)
except urllib.error.HTTPError as error:
    raise RuntimeError(f"HTTP {error.code}: {error.read().decode('utf-8', errors='replace')}") from error
if result.get("success") is False:
    raise RuntimeError(result.get("error", {}).get("message", "Request failed"))
print(json.dumps(result["data"]["output"], indent=2))
```

```typescript
// Save as fous.mts and run with npx tsx fous.mts.
const apiKey = "YOUR_API_KEY";

const response = await fetch("https://api.fous.com/v1/query", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${apiKey}`,
    "Content-Type": "application/json",
  },
  signal: AbortSignal.timeout(180_000),
  body: JSON.stringify({
  "api": "@rhymezone",
  "visibility": "public",
  "operation": "get_related_words",
  "version": 1,
  "input": {
    "word": "fast",
    "relation": "opposite_meaning",
    "max_results": 3
  },
  "response": {
    "format": "json"
  }
}),
});
type ApiResult = { success: boolean; data?: { output: unknown }; error?: { message: string } };
const result: ApiResult = await response.json();
if (!response.ok || result.success === false) {
  throw new Error(result.error?.message ?? `HTTP ${response.status}`);
}
if (!result.data) throw new Error("Missing API response data");
console.log(result.data.output);
```

## Use from an AI assistant

Connect this tool to Claude Code, Claude Desktop, Cursor, VS Code, Codex and any MCP client as its own MCP server. Each method is a typed tool whose arguments are the method’s input.

- Server URL: `https://api.fous.com/mcp/tools/rhymezone`
- Authorization: `Authorization: Bearer <Fous API key>`

**Tools**

- `get_related_words`: Get related words. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.
- `get_rhymes`: Get rhymes. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.
- `fous_get_run`: the result of a run that was still going, by its `request_id`. Free.

Claude Code:

```bash
claude mcp add --scope user --transport http fous-rhymezone https://api.fous.com/mcp/tools/rhymezone --header "Authorization: Bearer ${FOUS_API_KEY:?Set FOUS_API_KEY to your Fous API key}"
```

To give the assistant every tool, connect `https://api.fous.com/mcp`: it finds one with `fous_search_tools` and runs it with `fous_run_tool`. Setup for other clients: https://fous.com/llms-full.txt.

## Use cases

- Find rhyming words for poems and lyrics
- Compare perfect and near rhymes
- Explore words with similar or opposite meanings
- Find adjectives that describe a word
- Discover words associated with a topic

## FAQ

### Can I run it with my own inputs?

Yes. Change the inputs in Studio and press Run, or send new inputs from your code, or ask a connected AI assistant.

### Can I call this RhymeZone tool as an API?

Yes. Send a POST request to /v1/query with your Fous API key and the inputs, and get JSON back.

### How much does it cost?

Each completed run costs 1 credit. Failed runs without a completed receipt are free; completed work can remain charged if delivery is interrupted. With pay as you go, a credit costs 1¢. Monthly plans cost less per credit.

### Do I need a RhymeZone account?

No. You only need a Fous account.

### How current is the data?

Fous gets the data from rhymezone.com when you run it. Some results are reused for up to 24 hours, and results that use your account or key are never reused. It was last verified on Sep 29, 2026.

### What words rhyme with a given word?

Get rhymes returns perfect rhymes, near rhymes, or similar-sounding words for the input word.

### What words have a similar or opposite meaning?

Get related words returns words with similar or opposite meanings for the input word or short phrase.

### Which adjectives describe a word?

Get related words can return adjectives describing the input word when the relation is set accordingly.

## Related

- [Dictionary.com API](https://fous.com/tools/dictionary-com.md): Dictionary.com provides definitions, pronunciations, audio, examples, and word origins, plus ranked synonyms and antonyms for public Thesaurus.com entries; some word details may be unavailable.
- [Merriam-Webster API](https://fous.com/tools/merriam-webster.md): Merriam-Webster provides definitions, pronunciations, examples, word histories, synonyms, antonyms, and related words for publicly listed entries, plus Word of the Day entries for today or published archive dates.
- [WordReference API](https://fous.com/tools/wordreference.md): Dictionary translations and language reference.
- [Wiktionary API](https://fous.com/tools/wiktionary.md): A free, multilingual dictionary with word meanings and language information.
- [Poetry Foundation API](https://fous.com/tools/poetry-foundation.md): Poetry Foundation provides poems, poets, and poetry resources; poem searches follow its search order, while full text is limited to publicly available poems.
- [Etymonline API](https://fous.com/tools/etymonline.md): Origins and histories of English words from the Online Etymology Dictionary.
- [Urban Dictionary API](https://fous.com/tools/urban-dictionary.md): Urban Dictionary provides crowdsourced slang definitions and examples, plus up to 30 newest Words of the Day with featured dates.
- [BrainyQuote API](https://fous.com/tools/brainyquote.md): BrainyQuote returns topic-matched quotes in displayed order, a person’s description and up to 100 quotes with topic tags and links, or the quote shown for the chosen daily category and BrainyQuote’s current day.
- [All Education tools](https://fous.com/tools/category/education)