modern vs doer

modern and doer both are nouns.

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

As nouns, doer is a hypernym of modern; that is, doer is a word with a broader meaning than modern:

Other hypernyms of modern include actor, worker.

modern (noun)	doer (noun)
a typeface (based on an 18th century design by Gianbattista Bodoni) distinguished by regular shape and hairline serifs and heavy downstrokes	a person who acts and gets things done
a contemporary person

modern (adjective)	doer (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