MONOPLANES Antonyms There are 2 antonyms of the word monoplanes. (opposite meanings)Did you mean?Definition of MONOPLANESSynonyms of MONOPLANESAlso try opposite words for..monoplaneBest Opposite Words For MONOPLANESTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1biplanesnounn2triplanesnounn Alternatives for TRIPLANES Words (1)triplaneOpposite words for triplanes