Kortum rhymes with:
antemortem, mortem, antemortem, mortem, partum, accustom, ageratum, antemortem, arboretum, argosystem, atom, autumn, bantam, biosystem, bottom, cablesystem, centum, chatham, cheatham, cheatum, chittum, cottam, cottom, custom, datum, dictum, eastham, ecosystem, frantom, haltom, higginbottom, infinitum, item, lineitem, mentholatum, momentum, mortem, ottum, partum, phantom, quantum, rectum, sanctum, sense-datum, statum, stratum, subsystem, symptom, system, tatom, tatum, techsystem, telesystem, totem, ultimatum, ultrasystem, verbatim, victim, wintom
Kortum sounds like:
keratin, keratotomy, khartoum, kirton, koreatown, korten, kortman, kreitman, krudman