WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / A / assiduousness assiduousness noun /əsɪdʒuəsnɛs/ 5 syllables 13 letters Scrabble 14 WWF 17 Definitions noun great and constant diligence and attention assiduityconcentration Look “assiduousness” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →