Nouveau riche and Nouveau-riche

Nouveau riche noun - One who has recently acquired wealth and social position.

Nouveau-riche and nouveau riche are semantically related. In some cases you can replace phrase "Nouveau-riche" with "Nouveau riche", this phrases are similar.

Nouveau-riche noun - A person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class.

Nouveau riche and nouveau-riche are semantically related. You can use "Nouveau riche" instead a noun phrase "Nouveau-riche".