Synonyms For "Trounce" :
1 syllable:
beat, chide, crush, flog, jaw, lash, rag, scold, shell, slash, strap, welt, whip
2 syllables:
bawl out, beat out, berate, call down, chew out, chew up, dress down, have words, lambast, lambaste, lather, lecture, rebuke, vanquish