Synonyms for hi Found 8 synonyms across 2 meanings for “hi”. an expression of greeting (noun) hellohullohowdyhow-do-you-do a state in the United States in the central Pacific on the Hawaiian Islands (noun) hawaiihawai'ihaw. Explore Related Words Rhymes with hiSynonyms for helloSynonyms for hulloSynonyms for howdySynonyms for how-do-you-doSynonyms for hawaii Synonym Finder | Rhyme Finder | Poetry Editor