GRUESOME in Thesaurus: 1000+ Synonyms & Antonyms for GRUESOME www.powerthesaurus.org/gruesomePrivate View What's the definition of Gruesome in thesaurus? Most related words/phrases with sentence examples define Gruesome meaning and usage. Thesaurus for Gruesome. Related terms for gruesome- synonyms, antonyms and sentences with gruesome. Lists. synonyms. antonyms. definitions. sentences. thesaurus. Parts of speech. adjectives. adverbs. Synonyms