bother vs irritant

bother and irritant both are nouns.

Word	Noun	Adjective	Verb	Adverb
bother	Yes	No	Yes	No
irritant	Yes	No	No	No

As nouns, irritant is a hyponym of bother; that is, irritant is a word with a more specific, narrower meaning than bother:

Other hyponyms of bother include nuisance, thorn, plague.

bother (noun)	irritant (noun)
something or someone that causes trouble; a source of unhappiness	something that causes irritation and annoyance
an angry disturbance

bother (verb)	irritant (verb)
cause annoyance in; disturb, especially by minor irritations
make confused or perplexed or puzzled
make nervous or agitated
intrude or enter uninvited
take the trouble to do something; concern oneself
to cause inconvenience or discomfort to