old style vs modern

old style and modern both are nouns.

Word	Noun	Adjective	Verb	Adverb
old style	Yes	No	No	No
modern	Yes	Yes	No	No

old style (noun)	modern (noun)
a typeface (based on an 18th century design) distinguished by irregularity and slanted ascender serifs and little contrast between light and heavy strokes	a typeface (based on an 18th century design by Gianbattista Bodoni) distinguished by regular shape and hairline serifs and heavy downstrokes
	a contemporary person

old style (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