controversialist
n. வாத எதிர்வாதக்காரர், கருத்து மாறுபாட்டாளர்.
Con`tro*ver"sial*ist, n. Defn: One who carries on a controversy; a disputant. He [Johnson] was both intellectually and morally of the stuff of which controversialists are made. Macaulay.