Supplying rhymes with:
misapplying, applying, misapplying, applying, complying, implying, misapplying, plying, replying, applying, belying, complying, flying, implying, lying, misapplying, overflying, overlying, plying, relying, replying, underlying
Supplying sounds like:
sapling, saplings, scuffling, sephlon's, shoveling, shuffling, sibling, siblings, spalink, spelling, spelling's, spellings, spellman's, spelunk, spelunks, spilling, splenic, spoiling, squabbling, swiveling