fussiness vs crossness

fussiness and crossness both are nouns.

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

As nouns, fussiness and crossness are synonyms defined as:

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

fussiness (noun)	crossness (noun)
unnecessary elaborateness in details	a disposition to be ill-tempered
an irritable petulant feeling	an irritable petulant feeling