Underclass rhymes with:
upperclass, outclass, upperclass, eyeglass, fiberglas, fiberglass, hourglass, outclass, plexiglas, plexiglass, spyglass, sunglass, upperclass
upperclass, outclass, upperclass, eyeglass, fiberglas, fiberglass, hourglass, outclass, plexiglas, plexiglass, spyglass, sunglass, upperclass