Stiffly rhymes with:
diffley, awfully, beautifully, briefly, chiefly, colorfully, diffley, gruffly, hafley, heffley, hefley, medfly, muffley, peffley, powerfully, roughly, safely, safley, schlafly, stampfli, wolfley
Stiffly sounds like:
sheathbill, stabile, stable, stabley, staebell, stapel, staple, stapley, stavely, stavola, steeple, steeply, steffel, stefl, steppel, stibel, stiebel, stiefel, stifel, stiffel, stifle, stoffel, stoppel, stovall, stubble, stuteville, suggestible, suitable, suitably