bothersome vs irritating

bothersome and irritating both are adjectives.

Word	Noun	Adjective	Verb	Adverb
bothersome	No	Yes	No	No
irritating	No	Yes	No	No

As adjectives, bothersome and irritating are synonyms defined as:

Other synonyms of bothersome include annoying, galling, nettlesome, pesky, pestering, pestiferous, plaguey, plaguy, teasing, vexatious, vexing.

bothersome (adjective)	irritating (adjective)
causing irritation or annoyance	causing irritation or annoyance
	(used of physical stimuli) serving to stimulate or excite
	causing physical discomfort