WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / P / perfidiousness perfidiousness noun /pərfɪdiəsnɛs/ 5 syllables 14 letters Scrabble 20 WWF 23 Definitions noun betrayal of a trust perfidytreachery Look “perfidiousness” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →