WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / F / frontal sinus frontal sinus noun 13 letters Scrabble 15 WWF 19 Definitions noun one of a pair of cavities in the frontal bone Look “frontal sinus” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →