ROUNDEL Antonyms There are 9 antonyms of the word roundel. (opposite meanings)Did you mean?Definition of ROUNDELBest Opposite Words For ROUNDELTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1decagonnounn2diamondnounn3heptagonnounn4hexagonnounn5nonagonnounn6octagonnounn7rectanglenounn8squareverb, nounv, n9triangleverb, nounv, n Alternatives for DECAGON Words (1)decastyleOpposite words for decagon Alternatives for DIAMOND Words (13)sparklerbrilliantcrystalgemicejewelrockstoneadamantinfieldrhombrhombuslozengePhrases (4)precious stoneball fieldbaseball diamondbaseball fieldOpposite words for diamond Alternatives for NONAGON Words (1)enneagonOpposite words for nonagon Alternatives for OCTAGON Words (2)eight-sidedoctagonalOpposite words for octagon Alternatives for SQUARE Words (19)straightsquarelybourgeoisfeatherhashnormalorthogonalperpendicularpiazzaplazasharptetragonfoursquareheartylamesatisfyingsolidstraightforwardsubstantialPhrases (6)carpenter's squarepound signpublic squaresecond powersquare toessquare upOpposite words for square