Undercooked rhymes with:
overcooked, cooked, overcooked, precooked, booked, cooked, hooked, looked, overcooked, precooked, rebooked
Undercooked sounds like:
unaddressed, unauthorized, undercoat, undercut, underside, undersized, understate, understated, understood, understudy, underused, underweight, underweighted, undressed, uninterested