modernness vs contemporaneousness

modernness and contemporaneousness both are nouns.

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

As nouns, modernness and contemporaneousness are synonyms defined as:

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

Other synonyms of modernness include contemporaneity, modernism, modernity.

modernness (noun)	contemporaneousness (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