What rhymes with unstopper

chaper, chapper, choper, clopper, croper, droper, dropper, eavesdroper, eavesdropper, floper, flopper, hoper, loper, lopper, moper, mopper, poper, poppa, popper, propper, shoper, sloper, soper, sopper, stoper, stroper, stropper, swaper, swapper, swoper, tiptoper, tiptopper, unstoper, unstopper, whoper