Darkly rhymes with:
barkeley, barkley, markley, sparkly, starkly, barkeley, barkley, markley, sparkly, starkly
Darkly sounds like:
dercole, doorsill, dorsal, dorsally, dracula, drechsel, dressel, drexel, driscoll, driskell, driskill, drizzle, drizzly, drogoul, druisilla, drusilla, duracell