Mertle rhymes with:
mirtle, myrtle, birtle, ertel, ertl, ertle, fertile, hertel, hirtle, hurtle, infertile, mirtle, myrtle, pirtle, purtell, purtle, turtle
Mertle sounds like:
marital, martel, martell, martella, martelle, martelli, martello, martial, mirtle, moertel, mortal, mortally, mortell, myrtle