irritating vs bothersome

irritating and bothersome both are adjectives.

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

As adjectives, irritating and bothersome are synonyms defined as:

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

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