WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / W / window-efficiency window-efficiency /wɪndoʊɪfɪʃənsi/ 17 letters Scrabble 36 WWF 39 Definitions Look “window-efficiency” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →