Unallocated rhymes with:
allocated, misallocated, reallocated, allocated, misallocated, reallocated, uncomplicated, adjudicated, allocated, communicated, eradicated, extricated, lubricated, misallocated, pontificated, predicated, prognosticated, reallocated, reciprocated, sophisticated, suffocated, uncomplicated
Unallocated sounds like:
unallocate, unelected, unleashed, unlisted, unlocked, unmolested