querulousness vs irritability

querulousness and irritability both are nouns.

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

As nouns, irritability is a hypernym of querulousness; that is, irritability is a word with a broader meaning than querulousness:

Other hypernyms of querulousness include biliousness, peevishness, pettishness, snappishness, surliness, temper.

querulousness (noun)	irritability (noun)
the quality of being given to complaining	a disposition to exhibit uncontrolled anger
	excessive sensitivity of an organ or body part
	an irritable petulant feeling