1) Aggravating 2) Bothersome 3) Disagreeable 4) Eating at 5) Galling 6) Inconvenient 7) Infuriating 8) Irking 9) Irksome 10) Irritating 11) Maddening 12) Nettlesome 13) Persistent 14) Pesky 15) Pestering 16) Pesty 17) Plaguy 18) Riling 19) Tiresome 20) Troublesome 21) Trying 22) Unwanted 23) Vexatious 1) Bothersome 2) Bothersome, pesky 3) Causing annoyance 4) Causing irritation 5) Disagreeable 6) Galling 7) Irksome 8) Irritating 9) Nettlesome 10) Pesky 11) Pestering 12) Pestiferous 13) Plaguey 14) Plaguy 15) Teasing 16) Vexatious 17) Vexing 
• (a.) That annoys; molesting; vexatious. • (p. pr. & vb. n.) of Annoy
An·noy'ing adjective That annoys; molesting; vexatious. -- 
[adj] - causing irritation or annoyance
annoying Causing vexation or irritation; troublesome; such as, an annoying cough.
bothersome adjective causing irritation or annoyance; `tapping an annoying rhythm on his glass with his fork`; `aircraft noise is particularly bothersome near the airport`; `found it galling to have to ask permission`; `an irritating delay`; `nettleso...
causing annoyance; irritatingly bothersome: annoying delays.