WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / P / pentoxide pentoxide noun 3 syllables 9 letters Scrabble 19 WWF 21 Definitions noun an oxide containing five atoms of oxygen in the molecule Look “pentoxide” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →