WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / S / spontaneously spontaneously adverb 13 letters Scrabble 18 WWF 22 Definitions adverb without advance preparation ad libad libitumimpromptu in a spontaneous manner “this shift occurs spontaneously” Look “spontaneously” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →