Difference between Irritate and Annoy

IRRITATE vs ANNOY: NOUN

A feeling of discomfort or vexation caused by what one dislikes; also, whatever causes such a feeling.
[Now chiefly poetic; the common word in prose is annoyance.]
A thing or circumstance that causes discomfort; an annoyance.
That which causes such a feeling.
A disturbed state of feeling arising from displeasing acts or unpleasant circumstances; discomfort; vexation; trouble; annoyance.

Cause annoyance in; disturb, especially by minor irritations
Excite to some characteristic action or condition, such as motion, contraction, or nervous impulse, by the application of a stimulus
To provoke impatience, anger, or displeasure.
To introduce irritability.
To cause or induce displeasure or irritation.
To induce pain in (all or part of a body or organism).
Excite to an abnormal condition, or chafe or inflame
Excite to an abnormal condition, of chafe or inflame

To cause a physiological response to a stimulus in (a cell, body tissue, or organism).
To make sore or inflamed.
To cause (someone) to feel impatient or angry; annoy: : annoy.
To be a cause of impatience or anger.

To make morbidly excitable, or oversensitive; to fret
To produce irritation in; to stimulate; to cause to contract. See Irritation, n., 2.
To excite anger or displeasure in; to provoke; to tease; to exasperate; to annoy; to vex.
To increase the action or violence of; to heighten excitement in; to intensify; to stimulate.

To cause irritation to (another); make somewhat angry.
To disturb or irritate, especially by continued or repeated acts; to tease; to ruffle in mind; to vex
To harass or disturb by repeated attacks.
To molest, incommode, or harm.

To excite to automatic action by external agency, as organic tissue; produce motion, contraction, or inflammation in by stimulation: as, to irritate the skin by chafing or the nerves by teasing.
To give greater force or energy to; excite.
Synonyms Provoke, Incense, etc. (see exasperate); fret, chafe, nettle, sting, annoy, gall, inflame, excite, anger, enrage.
To render null and void.
Excited; exasperated; intensified.
Cause annoyance in
To excite to resentment or anger; annoy; vex; exasperate: as, to be irritated by an officious or a tedious person.

To be hateful or troublesome: followed by to.
[By omission of reflexive pronoun.] To be troubled, disquieted, vexed.
To be hateful, troublesome, or vexatious to; trouble, disquiet, disturb, vex, molest, harass, plague; irk, weary, bore, especially by repeated acts: as, to annoy a person by perpetual questioning; to annoy the enemy by raids: in the passive, followed by at or about, formerly by of.
Synonyms Molest, Plague, etc. (see tease), trouble, disturb, disquiet, vex, irritate, fret, embarrass, perplex.
Cause annoyance in

Pique, Cause, Miff, Irk, Get at, Gravel, Get to, Nettle, Devil, Nark, Rag, Vex, Bother, Rile, Annoy

Irk, Pester, Embarrass, Harass, Get at, Gravel, Nettle, Get to, Rag, Devil, Nark, Vex, Bother, Rile, Irritate

Roil, Chafe, Cause, Miff, Irk, Get at, Gravel, Get to, Nettle, Devil, Nark, Rag, Vex, Rile, Annoy

Disturb, Irk, Pester, Embarrass, Harass, Get at, Gravel, Nettle, Get to, Rag, Devil, Nark, Vex, Rile, Irritate

Does your child annoy you in the house?
What Aspects of Modern Life Annoy You Most?
TFRS with Annoy, an approximate nearest neighbours library.
It is not my intent to annoy anybody.
Some of their decisions might even annoy you.
Mail that is too frequent can annoy recipients.
Yes, brothers annoy the hell out of sisters.
SPAM regulations, but they also annoy your recipients.
Think of them as a wasp: annoy a wasp and it stings, annoy an airbag and it goes off and can cause serious injury!
Notifying them every few hours would surely annoy them, which in turn they will annoy the Administrator.