Heckling rhymes with:
mechling, buckling, chronicling, chuckling, conkling, crackling, duckling, fickling, hickling, inkling, mechling, pickling, rankling, sparkling, sprinkling, strickling, suckling, swashbuckling, tackling, trickling, weakling
Heckling sounds like:
haggling, hassling, heslin's, hessling, hickling, housecleaning