WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / E / exosphere exosphere noun /ɛksoʊsfir/ 3 syllables 9 letters Scrabble 21 WWF 21 Definitions noun the outermost atmospheric layer Look “exosphere” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →