Quicker rhymes with:
whicker, wicker, zwicker, bicker, bricker, clicker, dicker, ficker, flicker, fricker, kicker, knicker, licker, liquor, macvicar, mcvicar, mcvicker, picker, redicker, ricker, schicker, schlicher, schlicker, schricker, sicker, slicker, snicker, sticker, stricker, thicker, ticker, vicar, vicker, whicker, wicker, zwicker, zycher
Quicker sounds like:
qasr, quackery, quaker, quarre, quarry, quasar, queer, queerer, querry, query, quire, quiry