aid: words name: Words API description: >- Words API is a RESTful English-language API that provides definitions, synonyms, antonyms, related words, syllables, pronunciation (IPA), rhymes, frequency, and hierarchical lexical relationships (typeOf, hasTypes, partOf, hasParts, memberOf, similarTo, also, entails, inCategory, inRegion, pertainsTo, etc.) for more than 150,000 English words. Distributed and metered through the RapidAPI marketplace. url: https://www.wordsapi.com/docs/ baseURL: https://wordsapiv1.p.rapidapi.com image: https://www.wordsapi.com/img/logo.png specificationVersion: '0.20' created: '2026-05-28' modified: '2026-05-30' x-source: public-apis/public-apis x-category: "Dictionaries" x-tier: 3 x-tier-reason: bulk-registered-from-public-apis tags: - Dictionaries - Linguistics - English - Thesaurus - Lexical Data - Public APIs apis: - name: Words API description: >- RESTful English-language dictionary, thesaurus, and lexical-relationship API. One base resource — /words/{word} — plus 28 sub-resources for individual detail types (definitions, synonyms, antonyms, examples, rhymes, frequency, syllables, pronunciation, hasTypes, typeOf, partOf, hasParts, instances, instanceOf, similarTo, also, entails, memberOf, hasMembers, substanceOf, hasSubstances, inCategory, hasCategories, usageOf, hasUsages, inRegion, regionOf, pertainsTo) and a /words search/random endpoint with letter, sound, and part-of-speech filters. humanURL: https://www.wordsapi.com/docs/ baseURL: https://wordsapiv1.p.rapidapi.com tags: - Dictionaries - Thesaurus - Linguistics - English properties: - type: Documentation url: https://www.wordsapi.com/docs/ - type: APIReference url: https://www.wordsapi.com/docs/#endpoints - type: Authentication url: https://www.wordsapi.com/docs/#authorization - type: SignUp url: https://rapidapi.com/dpventures/api/wordsapi - type: OpenAPI url: openapi/words-openapi.yml - type: NaftikoCapability url: capabilities/words-word.yaml - type: NaftikoCapability url: capabilities/words-definitions.yaml - type: NaftikoCapability url: capabilities/words-thesaurus.yaml - type: NaftikoCapability url: capabilities/words-examples.yaml - type: NaftikoCapability url: capabilities/words-phonetics.yaml - type: NaftikoCapability url: capabilities/words-frequency.yaml - type: NaftikoCapability url: capabilities/words-hierarchy.yaml - type: NaftikoCapability url: capabilities/words-categories.yaml - type: NaftikoCapability url: capabilities/words-search.yaml - type: JSONSchema title: WordEntry url: json-schema/words-word-entry-schema.json - type: JSONSchema title: Result url: json-schema/words-result-schema.json - type: JSONSchema title: DefinitionsResponse url: json-schema/words-definitions-response-schema.json - type: JSONSchema title: SynonymsResponse url: json-schema/words-synonyms-response-schema.json - type: JSONSchema title: AntonymsResponse url: json-schema/words-antonyms-response-schema.json - type: JSONSchema title: ExamplesResponse url: json-schema/words-examples-response-schema.json - type: JSONSchema title: RhymesResponse url: json-schema/words-rhymes-response-schema.json - type: JSONSchema title: FrequencyResponse url: json-schema/words-frequency-response-schema.json - type: JSONSchema title: SyllablesResponse url: json-schema/words-syllables-response-schema.json - type: JSONSchema title: PronunciationResponse url: json-schema/words-pronunciation-response-schema.json - type: JSONSchema title: SearchResponse url: json-schema/words-search-response-schema.json - type: JSONStructure title: WordEntry url: json-structure/words-word-entry-structure.json - type: JSONStructure title: Result url: json-structure/words-result-structure.json - type: Example title: WordEntry Example url: examples/words-word-entry-example.json - type: Example title: DefinitionsResponse Example url: examples/words-definitions-response-example.json - type: Example title: SynonymsResponse Example url: examples/words-synonyms-response-example.json - type: Example title: FrequencyResponse Example url: examples/words-frequency-response-example.json - type: Example title: SearchResponse Example url: examples/words-search-response-example.json common: - type: Website url: https://www.wordsapi.com/ - type: Documentation url: https://www.wordsapi.com/docs/ - type: SignUp url: https://rapidapi.com/dpventures/api/wordsapi - type: Pricing url: https://rapidapi.com/dpventures/api/wordsapi/pricing - type: Blog url: https://blog.wordsapi.com/ - type: Contact url: mailto:support@wordsapi.com - type: GitHubOrganization url: https://github.com/WordsAPI - type: GitHubRepository title: Word Frequencies Dataset url: https://github.com/WordsAPI/wordfrequencies - type: Marketplace title: RapidAPI Listing url: https://rapidapi.com/dpventures/api/wordsapi - type: PublicAPIsListing url: https://github.com/public-apis/public-apis - type: Features data: - name: 150,000+ English Words description: Definitions, syllables, pronunciation, and lexical relationships across more than 150,000 English words. - name: Definitions and Parts of Speech description: Per-sense definitions grouped by part of speech (noun, verb, adjective, adverb). - name: Thesaurus (Synonyms and Antonyms) description: Interchangeable and opposite-meaning words for each sense of a word. - name: Lexical Hierarchies description: typeOf, hasTypes, partOf, hasParts, instanceOf, hasInstances, memberOf, hasMembers, substanceOf, hasSubstances, inCategory, hasCategories relationships. - name: Pronunciation in IPA description: International Phonetic Alphabet pronunciation, optionally split per part of speech. - name: Syllable Breakdown description: Syllable count and the ordered list of syllables for each word. - name: Rhymes description: Lists of rhyming words, distinguished by pronunciation variant where pronunciations differ. - name: Frequency Data description: Zipf frequency (1–7), per-million occurrence rate, and corpus diversity score derived from large English subtitle corpora. - name: Examples description: Sample sentences illustrating real usage for each sense. - name: Regional and Domain Usage description: inRegion, regionOf, inCategory, hasCategories, usageOf, hasUsages relationships connect words to dialects and subject domains. - name: Random and Filtered Word Search description: /words search endpoint supports letter count, letter pattern, phoneme count, IPA pattern, part of speech, and random selection. - type: UseCases data: - name: Dictionary and Thesaurus Applications description: Power dictionary, thesaurus, and "word of the day" applications with definitions, synonyms, and related words. - name: Word Games and Puzzles description: Drive crossword, Scrabble-style, and anagram games with filtered word search, rhymes, and difficulty-tunable random word selection. - name: Writing and Editing Tools description: Build grammar, style, and writing assistants that suggest synonyms, antonyms, and frequency-aware alternatives. - name: Language Learning and Education description: Provide IPA pronunciation, syllable splits, frequency, and example sentences for ESL and vocabulary-building apps. - name: NLP and Text Enrichment description: Enrich downstream NLP pipelines with hypernyms, hyponyms, meronyms, and domain labels for entity expansion. - name: Voice and Speech Applications description: Use IPA pronunciation and syllable data for speech synthesis, ASR vocabulary tuning, and pronunciation coaching. - name: Chatbots and Conversational Agents description: Disambiguate user input by mapping words to their senses, hypernyms, and categories at runtime. - name: Content Generation and Rewriting description: Drive paraphrasing and content-variation engines with synonym, similar-to, and pertains-to relationships. - type: Integrations data: - name: RapidAPI description: Words API is distributed, authenticated, and metered through the RapidAPI marketplace. - name: WordNet description: Lexical relationships (typeOf, hasParts, memberOf, etc.) follow the WordNet relational model. - name: Subtitle Corpora description: Frequency data is derived from large English movie and television subtitle corpora (see WordsAPI/wordfrequencies on GitHub). - type: Solutions data: - name: Free Tier description: 2,500 requests per day at no charge for prototyping, students, and small projects. - name: Pro description: $10 / month, 25,000 requests per day for production applications and games. - name: Ultra description: $49 / month, 250,000 requests per day for high-volume consumer applications. - name: Mega description: $89 / month, 500,000 requests per day for very high-volume production workloads. - name: Data Purchase description: One-time $629 purchase of the full Words API dataset for local hosting. - type: Plans url: plans/words-plans-pricing.yml - type: RateLimits url: rate-limits/words-rate-limits.yml - type: FinOps url: finops/words-finops.yml - type: SpectralRules url: rules/words-rules.yml - type: Vocabulary url: vocabulary/words-vocabulary.yml - type: JSONLD url: json-ld/words-context.jsonld maintainers: - FN: Kin Lane email: kin@apievangelist.com