VALVELESS Antonyms There are 4 antonyms of the word valveless. (opposite meanings)Did you mean?Definition of VALVELESSAlso try opposite words for..lessBest Opposite Words For VALVELESSTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1valvedadjectiveadj2valvularverb, adjectivev, adj3valvaradjectiveadj4valvateadjectiveadj Alternatives for VALVULAR Words (2)valvalvalvarOpposite words for valvular