contemporaneousness vs modern

contemporaneousness and modern both are nouns.

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

contemporaneousness (noun)	modern (noun)
the quality of being current or of the present	a typeface (based on an 18th century design by Gianbattista Bodoni) distinguished by regular shape and hairline serifs and heavy downstrokes
the quality of belonging to the same period of time	a contemporary person

contemporaneousness (adjective)	modern (adjective)
	belonging to the modern era; since the Middle Ages
	relating to a recently developed fashion or style
	characteristic of present-day art and music and literature and architecture
	ahead of the times