Herl rhymes with:
hearl, hurl, berle, birle, burl, curl, earl, earle, earll, erl, girl, hearl, hurl, kerl, merl, merle, nerl, pearl, pearle, perl, perle, searl, searle, shirl, sperl, swirl, twirl, unfurl, whirl, whorl, wurl
Herl sounds like:
harl, harle, harley, harlow, harral, harrel, harrell, harrill, harwell, hearl, herlihy, herrell, herrle, horrell, hourly, hurl, hurley, hurly, hurrell