a person, thing, that causes trouble, worry or annoyance

trouble, inconvenience

to say that one is not satisfied, that something is wrong, that one is suffering

grumble about

a real or imagined cause for complaint or protest

complaint, gripe

(a kind of) bird with feathered feet, shot for food; (to make) a complaint

complaint

a complaint or protest

complain

a statement of disapproval or objection

complaint, disapproval