Here's what rhymes with shadowsoul.
whole soul hole sole fol shoal foal thole vole role coal goal pole roll bowl mole poll stole toll knoll dole bole boll kohl tole dolour skoal parole scroll stroll droll petiole troll cubbyhole prole rissole patrol enroll systole casserole extol vacuole buttonhole cajole unroll bedroll oriole maypole extoll beanpole innersole glycerol condole pigeonhole camisole control arteriole profiterole quadrupole decontrol