Wordnik

Spec sheet

Product

Wordnik describes itself as the world's biggest online English dictionary by number of words and says its mission is to find and share as many English words as possible.Read 11 Oct 2026 · wordnik.com

Security

Wordnik's privacy policy says it uses administrative, physical, and electronic safeguards, including encryption, firewalls, and SSL during transmission, and says it cannot guarantee protection against all threats.Read 11 Oct 2026 · wordnik.com

Privacy

Wordnik's FAQ says it will never sell personal user data or share it with other organizations or use it for marketing purposes.Read 11 Oct 2026 · wordnik.com

Support

Wordnik directs API questions to [email protected] and general feedback to [email protected].Read 11 Oct 2026 · developer.wordnik.com

Founded

2009Read 28 Sep 2026 · wordnik.com

Company

Wordnik states that it is a 501(c)(3) nonprofit organization; its About page lists a postal address in Portland, Oregon.Read 11 Oct 2026 · wordnik.com

API caching limit

Basic Plan users cannot cache API data; paid-plan users may temporarily cache display text, but not raw API data, for offline use.Read 11 Oct 2026 · developer.wordnik.com

API use

Wordnik permits commercial apps using its API, but asks commercial apps beyond proof-of-concept stage to upgrade to a paid plan; an app cannot duplicate the Wordnik API itself.Read 11 Oct 2026 · developer.wordnik.com

Community features

Logged-in users can create word lists, comment on word pages, list pages, and profiles, and mark words as favorites.Read 11 Oct 2026 · wordnik.com

Definitions

The site shows definitions from multiple sources, and the API offers definitions from five dictionaries covering more than 800,000 words.Read 11 Oct 2026 · developer.wordnik.com

Downloadable data

Wordnik offers a downloadable dataset of nearly 200,000 words and definitions optimized for word games.Read 11 Oct 2026 · developer.wordnik.com

Examples

Wordnik provides real example sentences and links to their sources for more than 10,000,000 words.Read 11 Oct 2026 · developer.wordnik.com

Integrations and data sources

Wordnik says it uses WordNet for much of its hypernym and hyponym data, and its word-page images come from Flickr under a Creative Commons license.Read 11 Oct 2026 · wordnik.com

Other API features

The API includes audio pronunciations, word-of-the-day and random-word endpoints, spelling suggestions, and word phrases.Read 11 Oct 2026 · developer.wordnik.com

Related words

Wordnik's word relationships include synonyms, hypernyms, hyponyms, words used in the same context, reverse dictionary results, and tags.Read 11 Oct 2026 · wordnik.com

Plans and prices

Every Wordnik plan and price →

Where Specifiction places it

• Online Dictionaries#27 of 397.5