* Merriam-Webster Thesaurus: [https://www.merriam-webster.com/thesaurus](https://www.merriam-webster.com/thesaurus)
* Dictionary.com Thesaurus: [https://www.dictionary.com/browse/thesaurus](https://www.dictionary.com/browse/thesaurus)
* Thesaurus.com: [https://www.thesaurus.com/](https://www.thesaurus.com/)
* Oxford Learner's Thesaurus: [https://www.oxfordlearnersdictionaries.com/](https://www.oxfordlearnersdictionaries.com/)
These websites offer a good range of synonyms and antonyms for various words, as well as examples of their usage.
It's also worth noting that many online dictionaries, like Google Dictionary, provide synonyms and antonyms in their definitions.