There'll rhymes with:
baril, behrle, berrill, beryl, burel, burell, caryl, ceryl, cheryl, darrel, darrell, darryl, daryl, deryle, erol, errol, farrel, feral, ferol, ferrall, harrell, herrell, herrle, imperil, jerel, jheryl, karel, merrell, merrill, meryl, meryll, ofarrell, peril, purile, sharyl, sherrell, sheryl, sterile, terral, terrel, terrell, terrill, therrell, verrall, wehrle
There'll sounds like:
tarallo, tarheel, tarlow, tearle, terral, terrel, terrell, terrile, terrill, therrell, thorell, thorley, thrall, thrill, thurlow, tirello, tirrell, torell, torelli, torello, torley, trail, trela, trella, trial, trill, trillo, triola, triolo, troll, trolley, trowel, trowell, truell, trull, truly, turley, turrell, turrill, tutorial, twirl, tyrell, tyrrell