Noun, な adjective, and の adjective
りゅうせい
アメリカで最も隆盛を極めて入る州は何州ですか。
Which state is the most prosperous in the U.S.?
Prosperity in piles is a lot of prosperity!
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.