WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / arduousness arduousness noun /ɑrdʒuəsnɛs/ 4 syllables 11 letters Scrabble 12 WWF 15 Definitions noun extreme effortfulness strenuousness Look “arduousness” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →