DISPUTANT
disputant, controversialist, eristic
(noun) a person who disputes; who is good at or enjoys controversy
Source: WordNet® 3.1
Etymology
Noun
disputant (plural disputants)
A participant in a dispute.
Adjective
disputant (comparative more disputant, superlative most disputant)
Disputing; engaged in controversy.
Source: Wiktionary
Dis"pu*tant, a. Etym: [L. disputants, p. pr. of disputare: cf. F.
disputant. See Dispute, v. i.]
Definition: Disputing; engaged in controversy. Milton.
Dis"pu*tant, n.
Definition: One who disputes; one who argues
A singularly eager, acute, and pertinacious disputant. Macaulay.
Source: Webster’s Unabridged Dictionary 1913 Edition