irritate vs harass

irritate and harass both are verbs.

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

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

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