Drenth rhymes with:
nth, tenth, absinthe, amaranth, billionth, coelacanth, corinth, cynth, dushyanth, eighteenth, eleventh, eranthe, fifteenth, fourteenth, helminth, hyacinth, hyacinthe, jacinth, jacinthe, labyrinth, millionth, month, nineteenth, ninth, nth, plinth, rhodanthe, seventeenth, seventh, sixteenth, tenth, thirteenth, threemonth, umpteenth
Drenth sounds like:
darned, daydreamed, dearment, dearmond, deodorant, dermody, dermot, dermott, determent, determinant, determinate, determined, deterrent, dethroned, detriment, doormat, dorinda, dormant, drained, dreamed, dreamt, droned, dronet, drowned, drumhead, drummed, drummond, duramed, durand, durando, durant, durante, durrant