Learn English – A person who chooses one of two opposing sides of an issue

single-word-requests

Is there any single word for a person who chooses one of two opposing sides of an issue?

Best Answer

Proponent, perhaps. That, in the OED’s definition, is

a person who puts forward or advocates a theory, proposal, or course of action; a propounder, a proposer. In later use also more generally: a person who is in favour of a proposal, a supporter.

Alternatively, you might want to consider protagonist. A protagonist originally meant the main character in a play or other work of fiction, but its use is now extended to describe someone who promotes, advocates or defends a particular cause or idea.