PENTAGON Antonyms There are 9 antonyms of the word pentagon. (opposite meanings)Did you mean?Definition of PENTAGONSynonyms of PENTAGONBest Opposite Words For PENTAGONTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1circleverb, noun, adjectivev, n, adj2heptagonnounn3hexagonnounn4nonagonnounn5octagonnounn6ovalnounn7rectanglenounn8squareverb, nounv, n9trapezoidnounn Alternatives for CIRCLE Words (21)roundbunchcoildiscdiskganggrouploopringbandcircuitencirclelaplotroachroofyroperophyrotaryroundaboutsetPhrases (4)dress circleforget me drugmexican valiumtraffic circleAbbreviations (1)r-2Opposite words for circle Alternatives for NONAGON Words (1)enneagonOpposite words for nonagon Alternatives for OCTAGON Words (2)eight-sidedoctagonalOpposite words for octagon Alternatives for OVAL Words (10)egg-shapedellipticalovateovoidellipseellipticoval-shapedoviformovularprolateOpposite words for oval Alternatives for SQUARE Words (19)straightsquarelybourgeoisfeatherhashnormalorthogonalperpendicularpiazzaplazasharptetragonfoursquareheartylamesatisfyingsolidstraightforwardsubstantialPhrases (6)carpenter's squarepound signpublic squaresecond powersquare toessquare upOpposite words for square