complainer
Definitions
A person who habitually expresses dissatisfaction, pain, or resentment.
Someone who formally makes an accusation or brings a charge against another party.
Examples
He is such a chronic complainer that nobody wants to work on a team with him.
The manager grew tired of the constant complainer who found fault with every new company policy.
Synonyms
Antonyms
optimist praiser supporter contented person appreciator cheerleader enthusiast