Sinusoid rhymes with:
ackroyd, adenoid, alkaloid, amyloid, android, asteroid, aykroyd, boothroyd, celluloid, corticosteroid, hemorrhoid, holroyd, mongoloid, nedlloyd, oldroyd, ovoid, paranoid, polaroid, rheumatoid, rhizoid, spheroid, unalloyed, vescinoid
Sinusoid sounds like:
sanctity, schenectady, schuknecht, secessionist, semi-height, sense-data, sensed, singed, skinniest, smacked, smashed, smestad, smoggiest, smoked, smoshed, snacked, snagged, sneaked, sneezed, sonesta, soonest, succinct, sumgait, summonsed, suncoast, sunkist, sunnyside, sunset, sunstate, sunsweet, swimsuit