FILLY Antonyms There are 4 antonyms of the word filly. (opposite meanings)Did you mean?Definition of FILLYAlso try opposite words for..filliesBest Opposite Words For FILLYTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1coltnounn2geldingnounn3mareverb, nounv, n4stallionnounn Alternatives for GELDING Words (5)castratedgeldedneuteredsteedcutOpposite words for gelding Alternatives for MARE Words (3)incubusmariasuccubusPhrases (1)female horseOpposite words for mare Alternatives for STALLION Words (2)entirestudhorseOpposite words for stallion