Severely rhymes with:
austerely, bierley, bierly, cavalierly, clearly, dearly, merely, myrlie, nearly, sincerely, yearly
Severely sounds like:
several, severally, soberly, sperl, sperle, spiral, spoerl, sprawl, sproul, sproule, sproull, sprowl, sprowle, spruell, spruiell, spruill