annoy vs irritate

annoy and irritate both are verbs.

Word	Noun	Adjective	Verb	Adverb
annoy	No	No	Yes	No
irritate	No	No	Yes	No

As verbs, annoy and irritate are synonyms defined as:

annoy and irritate: cause annoyance in; disturb, especially by minor irritations

Other synonyms of annoy include bother, chafe, devil, get at, get to, gravel, nark, nettle, rag, rile, vex.

annoy (verb)	irritate (verb)
cause annoyance in; disturb, especially by minor irritations	excite to an abnormal condition, or chafe or inflame
	excite to some characteristic action or condition, such as motion, contraction, or nervous impulse, by the application of a stimulus
	cause annoyance in; disturb, especially by minor irritations