Synonyms for boo Found 9 synonyms across 2 meanings for “boo”. a cry or noise made to express displeasure or contempt (noun) hoothissraspberryrazzingrazzsnortbird show displeasure, as after a performance or speech (verb) hiss Explore Related Words Rhymes with booSynonyms for hootSynonyms for hissSynonyms for raspberrySynonyms for razzingSynonyms for razz Synonym Finder | Rhyme Finder | Poetry Editor