fretfulness vs crossness

fretfulness and crossness both are nouns.

Word	Noun	Adjective	Verb	Adverb
fretfulness	Yes	No	No	No
crossness	Yes	No	No	No

As nouns, fretfulness and crossness are synonyms defined as:

Other synonyms of fretfulness include choler, fussiness, irritability, peevishness, petulance.

fretfulness (noun)	crossness (noun)
an irritable petulant feeling	a disposition to be ill-tempered
	an irritable petulant feeling