There are 380 10-letter words that end with 'ness'.
Note: These 380 10-letter words that end with 'ness' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with iness, eness, sness, dness, lness, tness, hness, gness, nness, rness, kness, yness, wness, mness, fness, cness, pness, oness, bness, aness, xness.
7-letter words end with 'ness' (42)