There are 7 12-letter words that end with 'acks'.
| biofeedbacks | diamondbacks | crackerjacks |
| leatherbacks | quarterbacks | steeplejacks |
| sticklebacks | ||
Note: These 7 12-letter words that end with 'acks' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with backs, racks, jacks, packs, lacks, tacks, sacks, hacks, nacks, wacks, iacks, macks, uacks, yacks.
5-letter words end with 'acks' (11)