Asteroid rhymes with:
hemorrhoid, polaroid, ackroyd, adenoid, alkaloid, amyloid, android, aykroyd, boothroyd, celluloid, corticosteroid, hemorrhoid, holroyd, mongoloid, nedlloyd, oldroyd, ovoid, paranoid, polaroid, rheumatoid, rhizoid, sinusoid, spheroid, unalloyed, vescinoid
Asteroid sounds like:
astred, astrid, astride, austerity