There are 21 9-letter words that end with 'ights'.
Note: These 21 9-letter words that end with 'ights' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with lights, eights, rights, fights, nights, sights, dights, tights, aights, bights, hights, mights, wights.
6-letter words end with 'ights' (12)