modernness vs contemporaneity

modernness and contemporaneity both are nouns.

Word	Noun	Adjective	Verb	Adverb
modernness	Yes	No	No	No
contemporaneity	Yes	No	No	No

As nouns, modernness and contemporaneity are synonyms defined as:

modernness and contemporaneity: the quality of being current or of the present

Other synonyms of modernness include contemporaneousness, modernism, modernity.

modernness (noun)	contemporaneity (noun)
the quality of being current or of the present	the quality of being current or of the present
	the quality of belonging to the same period of time