a person or thing that annoys; nuisance

Unwanted visitors are an annoyance.

an act or instance of annoying.

the feeling of being annoyed.

noun

pleasure , joy , delight , happiness , enjoyment , comfort

noun

vexation , irritation , pique , displeasure , irascibility , exasperation , indignation , distress , unhappiness , discontent , frustration , anger , irritant , inconvenience , nuisance , difficulty , trouble , headache * , aggravation , discomfort , botheration , bothering , harassment , pestering , provocation , bother , besetment , peeve , plague , torment , bore , disturbance , fly in the ointment , headache , infliction , molestation , pest , thorn , worry