WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / asthenosphere asthenosphere noun /æsθɛnəstir/ 4 syllables 13 letters Scrabble 21 WWF 21 Definitions noun the lower layer of the crust Look “asthenosphere” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →