Theologian rhymes with:
boyajian, carolingian, demirjian, deukmejian, fijian, kazanjian, kurkjian, manoogian, pelagian, phrygian, sahagian, stygian, tashjian, yemenidjian
Theologian sounds like:
talcum, talisman, talkin, talkin', tallahassean, talsma, telecom, telekom, telxon, tilghman, tillison, tillson, tilson, toalson, tolleson, tollison, tolsma, tolson