The noun hypernym hierarchy is visualized above. In this visualisation, pink nodes are new concepts, red nodes are WordNet synsets with Dutch synonyms and blue nodes are WordNet synsets without Dutch synonyms.

Open Dutch WordNet is a Dutch lexical semantic database.

It was created by removing the proprietary content from Cornetto and by using open source resources to replace this proprietary content.

Open Dutch Wordnet contains 117914 synsets, of which the majority are
nouns synsets: 98049. There are 18782 verb synsets and 1083 adjectival synsets. 51588 synsets contain at least one Dutch synonym, which leaves 66326 synsets still to obtain a synonym. The resource contains 92295 synonyms. The average polysemy is 1.5.

If you make use of this resource, we ask you to cite us using the following citation:

@InProceedings{Postma:Miltenburg:Segers:Schoen:Vossen:2016, author = “Marten Postma and Emiel van Miltenburg and Roxane Segers and Anneleen Schoen and Piek Vossen“, title = “Open {Dutch} {WordNet}”, booktitle = “Proceedings of the Eight Global Wordnet Conference”, year = 2016, address = “Bucharest, Romania“,}

We also created a demo, which allows the user to compute similarity between Dutch lemmas in Open Dutch Wordnet: Demo of Open Source Dutch WordNet. Release first version of the Open Dutch Wordnet (ODWN): December 02, 2014. By Marten Postma and Piek Vossen.


The demo of Open Source Dutch WordNet can be inspected by go through these steps:
(1) Use as browser Google Chrome or Mozilla Firefox
(2) Go to
(3) login with: username: gast, password: gast
(4) click in the left box on ‘ODWN’ add click the ‘Add’ button
(5) click the button ‘Open dictionaries’ and inspect the resource

This project has been co-funded by the Nederlandse Taalunie (2013-2014).