snappishness vs irritability

snappishness and irritability both are nouns.

Word	Noun	Adjective	Verb	Adverb
snappishness	Yes	No	No	No
irritability	Yes	No	No	No

As nouns, snappishness and irritability are synonyms defined as:

snappishness and irritability: a disposition to exhibit uncontrolled anger

Other synonyms of snappishness include biliousness, peevishness, pettishness, surliness, temper.

snappishness (noun)	irritability (noun)
a disposition to exhibit uncontrolled anger	a disposition to exhibit uncontrolled anger
	excessive sensitivity of an organ or body part
	an irritable petulant feeling