Synonyms for cuckoo Found 8 synonyms across 1 meaning for “cuckoo”. a man who is a stupid incompetent fool (noun) fatheadgoofgoofballbozojackassgoosetwatzany Explore Related Words Rhymes with cuckooSynonyms for fatheadSynonyms for goofSynonyms for goofballSynonyms for bozoSynonyms for jackass Synonym Finder | Rhyme Finder | Poetry Editor