Semitrailer rhymes with:
trailer, traylor, trailer, traylor, ailor, ayler, aylor, bailer, bailor, baler, baylor, caler, caylor, eyler, failor, faler, galer, gayler, gaylor, inhaler, jailer, kaler, kaylor, mailer, maler, nailor, naylor, paylor, sailer, sailor, sayler, saylor, scalar, seyler, seyller, shaler, staebler, tailor, tayler, taylor, thaler, trailer, traylor, whaler