Overmatch rhymes with:
mache, match, matsch, mismatch, rematch, attach, bache, batch, brach, bratsch, catch, detach, dispatch, drach, flach, gach, gatch, hach, hatch, kach, krach, lach, lache, latch, latsch, mache, match, matsch, mismatch, patch, rach, reattach, rematch, scratch, snatch, stach, tatsch, thach, thatch, tkach, unattach, vlach