Replying rhymes with:
applying, complying, implying, misapplying, plying, supplying, applying, belying, complying, flying, implying, lying, misapplying, overflying, overlying, plying, relying, supplying, underlying
Replying sounds like:
rappelling, raveling, rebelling, rebellion's, rebellions, refueling, repealing, repelling, replaying, replenish, revaluing, revealing, reveling, revlon's, rifling, rippling, rivaling, robling, roebling, ruffling