https://dictionary.cambridge.org/dictionary/english/
https://www.vocabulary.com/dictionary/
https://www.merriam-webster.com/dictionary/dictionary
GERMAN
https://www.collinsdictionary.com/dictionary/english-german
https://www.thesaurus.com/browse/thesaurus
https://en.oxforddictionaries.com/english-thesaurus
https://www.visualthesaurus.com
https://www.visual-thesaurus.com