Synonyms for whack Found 7 synonyms across 2 meanings for “whack”. the act of hitting vigorously (noun) knockbeltrapwhang hit hard (verb) whamwhopwallop Explore Related Words Rhymes with whackSynonyms for knockSynonyms for beltSynonyms for rapSynonyms for whangSynonyms for wham Synonym Finder | Rhyme Finder | Poetry Editor