century vs millenary

century and millenary both are nouns.

Word	Noun	Adjective	Verb	Adverb
century	Yes	No	No	No
millenary	Yes	Yes	No	No

century (noun)	millenary (noun)
ten 10s	a sum or aggregate of one thousand (especially one thousand years)
a period of 100 years	a span of 1000 years
	the 1000th anniversary (or the celebration of it)

century (adjective)	millenary (adjective)
	relating to or consisting of 1000
	of or relating to the doctrine of the millennium