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Word Tools – Related Words & Reverse Dictionary
x402
Word Tools – Related Words & Reverse Dictionary is a paid API for AI agents from word-tools.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Returns words semantically related to a given word or descriptive phrase, functioning as a reverse dictionary (e.g. 'ringing in the ears' finds 'tinnitus').
Price / call$0.02
Success—
StatusUnknown
How this service works
Words that mean something like a word or a described phrase, as a reverse dictionary: ringing in the ears finds tinnitus.
Output
A ranked list of words (up to 50, default 20) that are semantically related to or match the input phrase, each with a relevance score, parts of speech, pronunciation data, and syllable count. Also includes source attribution, a summary, and optional disclaimer or degraded-service flag.
Example use cases
Reverse dictionary for tip-of-tongue words
“I know what I mean but can't think of the word — it's that deep resonant sound a large bell makes. Can you look up words that match that description and give me the top 10?”
Finding technical terminology from plain descriptions
“What's the medical or scientific term for 'fear of open spaces'? Look up related words for that phrase and show me the best matches.”
Vocabulary enrichment for creative writing
“I'm writing and I need a precise word for 'the way light filters through leaves in a forest' — can you find related words for that description, maybe limit it to 15 results?”
Technical details
Endpoint
GEThttps://word-tools.x402tookit.com/related-words?utm_source=zero.xyzWhen to prefer
Choose this endpoint when the user knows a concept, description, or definition but cannot recall the specific word — i.e. a reverse dictionary query. It is also suitable for semantic word discovery around a theme. Prefer it over synonym tools when the input is a phrase rather than an existing word, and over general search when the goal is vocabulary retrieval rather than information lookup.
Side effects
- No results found for highly obscure or nonsensical input phrases
- Degraded response if upstream word data source is unavailable (degraded flag set true)
- Input phrase too long or ambiguous may return loosely related words
- limit parameter out of range (must be 1–50) may cause validation error
- Empty or missing 'word' query parameter returns an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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