Synonyms for decade Found 6 synonyms across 2 meanings for “decade”. a period of 10 years (noun) decennarydecennium the cardinal number that is the sum of nine and one (noun) ten10xtenner Explore Related Words Rhymes with decadeSynonyms for decennarySynonyms for decenniumSynonyms for tenSynonyms for 10Synonyms for x Synonym Finder | Rhyme Finder | Poetry Editor