There are 87 words that end with 'backs'.
Note: These 87 words that end with 'backs' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with ebacks, tbacks, lbacks, hbacks, rbacks, ybacks, wbacks, dbacks, kbacks, nbacks, gbacks, pbacks, abacks, sbacks, fbacks, mbacks.