crossness vs fussiness

crossness and fussiness both are nouns.

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

As nouns, crossness and fussiness are synonyms defined as:

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

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