Haydn's rhymes with:
poseidon's, widens, abandons, arden's, baden's, borden's, brandon's, breeden's, broadens, burdens, camden's, chernomyrdin's, cherumirdan's, coloradans, darden's, edens, garden's, gardens, giddens, golden's, gooden's, gordon's, harden's, hardens, holden's, jordan's, jordans, landon's, linden's, london's, maidens, mcfadden's, meldons, nevadans, ogden's, pardons, poseidon's, riordan's, rwandan's, rwandans, saddens, siddens, siddons, sweden's, tendons, warden's, wardens, wardens', weldon's, widens
Haydn's sounds like:
haitians, haitiens, hating, heading, headings, heating, hedding, hedonic, heeding, hiding, hitting, hodding, hoodwink, houdini's, houten's, huadong, hutnick, hutton's