Fumaroles rhymes with:
bankrolls, blowholes, bubolz, buttonholes, charcoals, flagpoles, foxholes, keyholes, krumholz, loopholes, metropol's, monopoles, orioles, orioles', payrolls, petroles, pinholes, postholes, potholes, redpolls, seminoles, superbowl's, superbowls, tadpoles, windholz