There are 314 15-letter words that end with 'ns'.
Note: These 314 15-letter words that end with 'ns' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with ons, ins, ans, ens, rns, wns, uns, gns, mns, nns, hns, lns, yns.
3-letter words end with 'ns' (4)