Synonyms for caliber Found 4 synonyms across 2 meanings for “caliber”. a degree or grade of excellence or worth (noun) qualitycalibre diameter of a tube or gun barrel (noun) boregauge Explore Related Words Rhymes with caliberSynonyms for qualitySynonyms for calibreSynonyms for boreSynonyms for gauge Synonym Finder | Rhyme Finder | Poetry Editor