Word Games Pro Dictionarybuna nounmade by polymerizing butadiene ⧉Copy definition ↗Share ▣Print / Save PDFQuick referenceWord FactsWord length4Starts withBEnds withAContainsUNScrabble score6Database sourceOEWN 2025 CoreMeaningDefinitionsnounmade by polymerizing butadieneKeep exploringRelated Tools Word Unscrambler Build words from mixed letters. → Scrabble Finder Find playable words and scores. → Word Finder Search A–Z word lists and patterns. → Starts With B Words beginning with B. → Ends With A Words ending with A. → 4 Letter Words Explore verified 4-letter words. →