pestiferous vs irritating

pestiferous and irritating both are adjectives.

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

As adjectives, pestiferous and irritating are synonyms defined as:

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

pestiferous (adjective)	irritating (adjective)
causing irritation or annoyance	causing irritation or annoyance
likely to spread and cause an epidemic disease	(used of physical stimuli) serving to stimulate or excite
tending to corrupt or pervert	causing physical discomfort
contaminated with infecting organisms