A (female) grumbler.

A murmurer, grumbler, complainer.

A grumbler; a murmurer.

A person who muses (in various senses); a person engaged in or given to thought or meditation; †a grumbler, a schemer (obsolete).

A complainer, a grumbler, a lamenter. Now English regional (northern).

gen. A person who complains, a complainer. Obsolete.

One who or something which irritates or chafes.

gen. One who complains, a complainer.

One who complains or gives audible expression to a sense of injury; a fault-finder, murmurer.

A person who is discontented; a grumbler, a complainer; (later also) a person who longs discontentedly for something.

One who grudges or murmurs; one who cherishes ill-will, resentment, or envy.

A person who moans (in various senses of the verb); a complainer or fault-finder; a pessimist.

One who grumbles; one who is given to utterances of discontent or dissatisfaction.

A person who complains, a complainer.

A person who murmurs; a grumbler. rare.

One who or something which growls.

A grumbler.

A discontented person; a grumbler, faultfinder. Also attributive.

a horse addicted to crib-biting; also figurative; also, a grumbler.

One who expostulates; †one who rebukes or complains of.

A moaner, a complainer.

One who groans; also slang, a thief who attends funerals or religious gatherings.

One who grumbles or complains.

A complainer.

a grumbler.

A gruff, grumpy, or ill-humoured person. colloquial.

A person who grumbles; a grumbler.

slang. An informer, a tale-teller; a complainer.

colloquial. A moaner, a complainer; a pessimist.

A grumbler, a disparager.

slang. One who ‘binds’ or complains (see bind, v. 23).