formalness vs formality

formalness and formality both are nouns.

Word	Noun	Adjective	Verb	Adverb
formalness	Yes	No	No	No
formality	Yes	No	No	No

As nouns, formalness and formality are synonyms defined as:

formalness and formality: a manner that strictly observes all forms and ceremonies

formalness (noun)	formality (noun)
a manner that strictly observes all forms and ceremonies	compliance with formal rules
	a manner that strictly observes all forms and ceremonies
	a requirement of etiquette or custom