[1] : WordNet (r) 2.0

pain in the neck
     n 1: a bothersome annoying person; "that kid is a terrible pain"
          syn: pain, nuisance
     2: something or someone that causes trouble; a source of
        unhappiness; "washing dishes was a nuisance before we got
        a dish washer"; "a bit of a bother"; "he's not a friend,
        he's an infliction" syn: annoyance, bother, botheration,
         pain, infliction, pain in the ass
see also:
pain nuisance annoyance bother botheration infliction 
pain in the ass 

[2] : Moby Thesaurus II by Grady Ward, 1.0

41 moby thesaurus words for "pain in the neck":
   aggravation, annoyance, bad news, bedevilment, bore, bother,
   botheration, bothersomeness, buttonholer, crashing bore, devilment,
   difficulty, dogging, downer, drag, drip, dryasdust, dusty,
   exasperation, flat tire, frightful bore, harassment, harrying,
   headache, hounding, humdrum, molestation, nuisance, persecution,
   pest, pill, problem, proser, trial, trouble, twaddler, vexation,
   vexatiousness, wet blanket, worriment, worry

Pain >> P Words
Pain, definition of term: Pain
pain_pag1.html

Neck >> N Words
Neck, definition of term: Neck
neck_pag1.html

Colts Neck >> C Words
Colts Neck, definition of term: Colts Neck
colts+neck_pag1.html

Goose Neck >> G Words
Goose Neck, definition of term: Goose Neck
goose+neck_pag1.html

Pain In The Ass >> P Words
Pain In The Ass, definition of term: Pain In The Ass
pain+in+the+ass_pag1.html