16 possible answers to
Answers with 4 characters: BUGS IRES IRKS Answers with 5 characters: RILES ROILS GALLS MIFFS Answers with 6 characters: ANGERS ANNOYS EATSAT TEASES Answers with 7 characters: BOTHERS NETTLES RANKLES Answers with 8 characters: HARASSES Answers with 9 characters: IRRITATES