buttoned-up vs conservative

buttoned-up is not a noun while conservative is a noun.

Word	Noun	Adjective	Verb	Adverb
buttoned-up	No	Yes	No	No
conservative	Yes	Yes	No	No

buttoned-up (noun)	conservative (noun)
	a person who is reluctant to accept changes and new ideas

buttoned-up (adjective)	conservative (adjective)
conservative in professional manner	resistant to change, particularly in relation to politics or religion
(British colloquial) not inclined to conversation	unimaginatively conventional
	conforming to the standards and conventions of the middle class
	avoiding excess
	having social or political views favoring conservatism