Thenceforth rhymes with:
dansforth, henceforth, dansforth, henceforth, dansforth, forth, fourth, goforth, henceforth, borth, dansforth, forth, fourth, goforth, henceforth, korth, north, orth, porth, warth
dansforth, henceforth, dansforth, henceforth, dansforth, forth, fourth, goforth, henceforth, borth, dansforth, forth, fourth, goforth, henceforth, korth, north, orth, porth, warth