European alternatives to WordHippo

The right European replacement depends almost entirely on which language you write in.

For German: OpenThesaurus is the standout — open-source, self-hostable, built into LibreOffice, and free. It covers German deeply with style and formality metadata. Duden Synonyme goes further on contextual nuance if you want meaning-grouped results. Woxikon adds multilingual coverage for free. For French: Larousse Dictionnaire des Synonymes has 160,000 synonyms and antonyms indexed and needs no account. Synonymo.fr is simpler and CNIL-registered. Reverso adds real corpus sentences alongside synonyms. For Dutch: Synoniemen.net is a clean, free, privacy-respecting Dutch thesaurus. For Swedish specifically: Synonymer.se carries 2M monthly users and integrates word games and a newsletter — the dominant Swedish option at freemium pricing with EU hosting in Amsterdam. Tyda.se is entirely free with Scandinavian language depth. Ordsynonymer sits alongside these as an EU-hosted, free Swedish thesaurus — a reasonable pick if you want GDPR-native hosting and a focused synonym tool rather than a feature bundle, though Synonymer.se has a larger corpus and more features, and Tyda.se offers more dictionary depth. For cross-language needs: Reverso handles 15+ languages with corpus-backed context, and DeepL covers translation with EU data residency. EuroVoc is the right answer only if you work in EU policy or legal documentation and need multilingual controlled vocabulary. For English: Cambridge Dictionary & Thesaurus (GDPR-compliant, UK data centers) is stronger than WordHippo's English synonym coverage. Collins is the other credible UK option with 500,000+ synonyms. Where WordHippo's breadth still wins: the rhyme finder, word forms, and translation-plus-thesaurus in one search have no single EU equivalent that does all of it at once. If that combination is what you need, the EU field requires stitching a couple of tools together.