Here's what rhymes with protozoal.
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 patrol parole scroll stroll droll cajole petiole troll unroll prole rissole innersole enroll systole casserole extol vacuole buttonhole bedroll condole oriole pigeonhole camisole cubbyhole maypole extoll control glycerol beanpole profiterole arteriole decontrol quadrupole