Opponent and Quibbler

Opponent noun - One that takes a position opposite another in a competition or conflict.

Quibbler and opponent are semantically related. In some cases you can use "Quibbler" instead a noun "Opponent".

Quibbler noun - A disputant who quibbles; someone who raises annoying petty objections.

Opponent and quibbler are semantically related. Sometimes you can use "Opponent" instead a noun "Quibbler".