Undetermined rhymes with:
predetermined, predetermined, predetermined, arvind, destined, eastwind, hipskind, lipkind, malinde, olinde, pergande, predetermined, rifkind, rivkind, rosalind, rosalynd, siskind, suskind, susskind, undisciplined, vandezande, velobind, wedekind, wittekind
Undetermined sounds like:
unadorned, underhanded, undermanned, undermined, underneath, underwent, undreamed, untrained, unturned