Thesauruses are books or online resources that provide synonyms for words. They are incredibly helpful for writers, students and anyone who wants to improve their vocabulary. However, there are several other terms that can be used instead of "thesauruses". Some alternatives include: synonym finders, lexicons, vocabularies, wordbooks, and dictionaries of synonyms. All of these resources provide a wide range of synonyms for words, and can help you communicate your ideas more effectively. Whether you're writing an academic paper, crafting a novel, or just looking to express yourself more precisely, a thesaurus or one of its synonyms will be an invaluable tool.