nuisance

[1]	annoyance , inconvenience , trial , ordeal , burden , irritation , irritant , thorn in the flesh/side , difficulty , bother , (US) bur under the saddle , (Colloq) pain (in the neck/rear) , headache , hassle , (Slang) (US/Canadian) pain in the butt , (Colloq) (Slang) pain in the (Brit) arse , /(US) ass
[2]	bore , pain , pain in the neck , pest , nag , tease , tormentor/tormenter