WordNet: controversialist, disputant, eristic

a person who disputes; who is good at or enjoys controversy

• hypernym individual, mortal, person, somebody, someone, soul

• hyponym contester

• hyponym accuser

• hyponym arguer, debater

• hyponym denier

• hyponym hairsplitter

• hyponym logomach, logomachist

• hyponym obstructer, obstructionist, obstructor, resister, thwarter

• hyponym quarreler, quarreller

• hyponym crusader, meliorist, reformer, reformist, social reformer

controversialist

• (suomi) poleemikko (synonyymi)

disputant

• (englanti) dispute (derivationally related)
• (suomi) väittelijä (synonyymi)

eristic

• (englanti) eristic (derivationally related)
• (suomi) väittelijä (synonyymi)