4 letters:
iler, tile, tire, tyer

5 letters:
byler, eiler, filer, hiler, hyler, isler, kyler, miler, myler, pilar, siler, syler, tiber, ticer, tiger, tiled, tiles, tiley, timer, tiner, tolar, toler, tyger, tylee, tyner, wiler, wyler

6 letters:
beiler, cuyler, feiler, geiler, heiler, huyler, seiler, tailor, taller, tayler, taylor, teller, tiller, tilles, toller, towler, tullar, tuller, weiler, zeiler

7 letters:
teicher, theiler, tighter, tyler's