WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / I / instantaneousness instantaneousness noun 17 letters Scrabble 17 WWF 22 Definitions noun the quickness of action or occurrence immediacyimmediatenessinstancy Look “instantaneousness” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →