Vocabulary · Infinite
Credit where it’s due.

Acknowledgements & Licences

Vocabulary · Infinite builds on years of work by people who study, organise and share the English language. We’re grateful to the creators of the open lexical resources used in our offline dictionary features.

A note of thanks

Words carry a great deal of history. Bringing their meanings and relationships into a useful, searchable resource takes a remarkable amount of work.

We gratefully acknowledge the researchers, editors, contributors and institutions behind Open English WordNet and Princeton WordNet. Their work helps power the offline lexical lookup and word-suggestion tools used by Vocabulary · Infinite.

Open English WordNet 2025

Vocabulary · Infinite uses material from Open English WordNet 2025, maintained by the Open English WordNet Team as an open-source lexical resource.

Attribution

Open English WordNet 2025
© 2019–present, The Open English WordNet Team.
Licensed under the Creative Commons Attribution 4.0 International licence (CC BY 4.0).

Parts of this resource have been selected, indexed and converted for use in the App’s local offline database. This is an adaptation of the underlying resource; the Open English WordNet Team is not responsible for changes we make.

Learn more at the Open English WordNet website and its official project repository.

Princeton WordNet

Open English WordNet was developed from the Princeton WordNet lexical database created at Princeton University. We acknowledge this foundational work and its contributors.

Attribution

Princeton WordNet — Princeton University.
The underlying Princeton WordNet material is subject to the WordNet licence and its copyright, disclaimer and non-endorsement conditions.

Suggested scholarly reference: George A. Miller (1995), WordNet: A Lexical Database for English, Communications of the ACM, 38(11), 39–41. See Princeton’s citation guidance.

Licences & official sources

Both upstream projects require attribution. Open English WordNet is released under CC BY 4.0 and incorporates material governed by the original Princeton WordNet licence. The full legal texts and upstream notices can be found at these official links:

These are third-party resources and licences. Their creators and institutions do not sponsor, endorse or certify Vocabulary · Infinite.

Our learning content

Our curated word packs, quiz questions, examples, interface and other original app content are separate from the third-party lexical resources credited above.

Attributing Open English WordNet and Princeton WordNet does not mean that all content in Vocabulary · Infinite is released under those licences. For information about using the App and its content, see our Terms of Use.

Questions about a credit or licence? Contact support@vocabulary-infinite.com.