There are 17 10-letter words that end with 'ack'.
| antihijack | canvasback | cornerback |
| crackajack | hackmatack | hydrocrack |
| lumberjack | multitrack | fiddleback |
| knickknack | postattack | silverback |
| smokestack | superflack | supplejack |
| switchback | turtleback | |
Note: These 17 10-letter words that end with 'ack' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with back, rack, jack, pack, lack, tack, sack, hack, nack, wack, iack, mack, yack, uack.
4-letter words end with 'ack' (11)