Data credits & licenses

WordCatch (version 2.0 of Vocabulary Master) uses the open data listed below. Definitions and translations shown in the app come from these sources and from Apple's on-device frameworks; they are not written by the original authors of the lists. Starter topics and their example sentences are selected and written by Nikmesoft; definitions come from Open English WordNet. The same notices are in the app under Settings → Credits.

Open English WordNet 2025 Edition

Definitions, examples, parts of speech and some pronunciations.

Open English WordNet contributors (en-word.net, github.com/globalwordnet/english-wordnet), derived from Princeton WordNet. Licensed under the Creative Commons Attribution 4.0 International License.

Changes: proper names removed; senses and examples containing exam trademarks removed; data converted to a local database.

New General Service List 1.2 and Business Service List 1.2

Word frequency ranks and word forms.

New General Service List by Browne, C., Culligan, B., and Phillips, J.; Business Service List by Browne, C. and Culligan, B. (newgeneralservicelist.com). Licensed under the Creative Commons Attribution-ShareAlike 4.0 International License (full text).

Our adapted word list is published under the same license:

wordlist.json — the adapted list (NGSL 1.2 and BSL 1.2 merged, with each source rank and word forms)
ATTRIBUTION.md — attribution and license of the adapted list
CHANGES.md — what we changed from the source lists

The rest of WordCatch's content is not part of this adaptation: definitions come from Open English WordNet (credited above); starter topics and their example sentences are written by Nikmesoft; translations are produced on the device by Apple's Translation framework.

CMU Pronouncing Dictionary

Questions

Found a mistake in a definition or an attribution? Email [email protected].