klucker

Example:She's a gossiper who loves to spread false rumors about her colleagues.

Definition:A person who habitually spreads rumors or private information about others.

Example:Mr. Smith is a scold who never misses an opportunity to criticize his employees for minor missteps.

Definition:A person who habitually criticizes or rebukes others, especially unduly.

Example:The grumbler always found something to complain about in the office.

Definition:A person who habitually complains about minor inconveniences or perceived injustices.