feudist

Etymology

From feud + -ist.

feudist means One who takes part in feuds. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

One who takes part in feuds.“After two years away, Rosie O’Donnell — actress, Broadway booster, consummate feudist — is returning to the stage.”
A writer about feuds; a person versed in feudal law.“[…]our great feudist Sir Thomas Craig”