FETAL Antonyms There are 2 antonyms of the word fetal. (opposite meanings)Did you mean?Definition of FETALSynonyms of FETALAlso try opposite words for..fetusesBest Opposite Words For FETALTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1adultnoun, adjectiven, adj2maturenoun, adjectiven, adj Alternatives for ADULT Words (16)full-grownadultdevelopedelderestablishedexperiencedmatureseniorbiggrownuppornographicbluegrownindecentobscenesalaciousPhrases (1)fully grownOpposite words for adult Alternatives for MATURE Words (16)adultripedevelopedfull-grownseasonedagegrowripendevelopmaturateprogressfledgedgrownmaturedsenescesuppuratePhrases (2)grow upget onOpposite words for mature