displease vs irritate

displease and irritate both are verbs.

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

As verbs, irritate is a hyponym of displease; that is, irritate is a word with a more specific, narrower meaning than displease:

Other hyponyms of displease include annoy, bother, chafe, devil, get at, get to, gravel, nark, nettle, rag, rile, vex, repel, repulse, dissatisfy.

displease (verb)	irritate (verb)
give displeasure to	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