BILLOWY Antonyms There are 2 antonyms of the word billowy. (opposite meanings)Did you mean?Definition of BILLOWYSynonyms of BILLOWYAlso try opposite words for..billowbillowingBest Opposite Words For BILLOWYTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1rigidadjectiveadj2sturdyadjectiveadj Alternatives for RIGID Words (24)inflexiblestiffunbendingadamantfirmhardimmovableimmutableobduratepersistentresolutesolidsteadfaststurdyunadaptableunbendableunchangeableunmovableunyieldingrigidifiedunpliantfixedsetstrictOpposite words for rigid Alternatives for STURDY Words (14)hardystouttoughdurablepowerfulresilientrobustruggedsolidstronginflexiblestalwartuncompromisinggidOpposite words for sturdy