complainer

As a noun complainer

is one who complains, or is known for their complaints.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between compliance and complainer

is that compliance is an act of complying while complainer is one who complains, or is known for their complaints.

As a verb critique

is .

As a noun complainer is

one who complains, or is known for their complaints.

As nouns the difference between complainer and liar

is that complainer is one who complains, or is known for their complaints while liar is one who tells lies.

As nouns the difference between complainer and rebel

is that complainer is one who complains, or is known for their complaints while rebel is a person who resists an established authority, often violently.

As a verb rebel is

to resist or become defiant toward an authority.

As nouns the difference between malcontent and complainer

is that malcontent is a person who is not satisfied with current conditions; a discontented person while complainer is one who complains, or is known for their complaints.

As an adjective malcontent

is dissatisfied with current conditions; discontented.

Complainer is a related term of insurgent.

As nouns the difference between complainer and insurgent

is that complainer is one who complains, or is known for their complaints while insurgent is one of several people who take up arms against the local state authority; a participant in insurgency.

As an adjective insurgent is

rebellious, opposing authority.

Complainer is a related term of grouch.

As nouns the difference between complainer and grouch

is that complainer is one who complains, or is known for their complaints while grouch is a complaint, a grumble, a fit of ill-humor.

As a verb grouch is

to be grumpy or irritable; to complain.

Complainer is a related term of growler.

As nouns the difference between complainer and growler

is that complainer is one who complains, or is known for their complaints while growler is a person, creature or thing that growls.

Complainer is a related term of faultfinder.

As nouns the difference between complainer and faultfinder

is that complainer is one who complains, or is known for their complaints while faultfinder is a person who finds fault.