13 possible answers to
Answers with 3 characters: IRE Answers with 4 characters: PAIN PEST Answers with 5 characters: PEEVE PIQUE CHRIN THORN Answers with 6 characters: HASSLE BOTHER Answers with 8 characters: HEADACHE VEXATION Answers with 10 characters: IRRITATION Answers with 13 characters: PAININTHENECK