Seventh rhymes with:
eleventh, eleventh, billionth, corinth, eleventh, eranthe, millionth, threemonth, absinthe, amaranth, billionth, coelacanth, corinth, cynth, drenth, dushyanth, eighteenth, eleventh, eranthe, fifteenth, fourteenth, helminth, hyacinth, hyacinthe, jacinth, jacinthe, labyrinth, millionth, month, nineteenth, ninth, nth, plinth, rhodanthe, seventeenth, sixteenth, tenth, thirteenth, threemonth, umpteenth
Seventh sounds like:
savant, seventieth, seventy, shipmate, shipment, siphoned, spanned, spawned, spend, spent, submit, submitted, subpoenaed, suspend, suspended