Colligan rhymes with:
costigan, donegan, dunegan, dunigan, finegan, hourigan, jarnigan, jernigan, branagan, burgan, costigan, donegan, dunegan, dunigan, dunnagan, finegan, hannagan, hourigan, jarnigan, jernigan, lanagan
Colligan sounds like:
calcagni, calcagno, calcium, calgene, calgon, calkin, callaghan, calligan, callison, chalasani, chilson, claassen, clasen, clason, classen, classicism, classman, classmen, classon, clausen, clauson, claussen, clawson, claxon, clayson, closson, coalson, colchicine, coleson, colgan, colgin, coliseum, collagen, collegian, collignon, collision, collison, colloquium, collusion, cologne, colosimo, colosseum, colson, coulson, culkin, culligan, cullison, cyclohexane