All you have to do is ask. Some three letter words ending in K are:
makers? takers? That's all I could come up with.
Lakers, fakers, shaker,
tick, tock, bock, lock, lick, pick, pock, dock, rock, sick, sock, turk, jerk, fork, pork, mock....
Ike
Kid.
Kicks begins with "k" and the 4th letter is "k".
4 letter word that starts with k
embarks
embarks
Kill
kill
KnowKnotKneeKnewKeepKeptKeelKeenKelpKilnKindKite
Clock
Kite
King
kill
kink