Here's how we can break it down:
* House: This is a noun, referring to a type of music genre.
* Africa: This is also a noun, referring to a continent.
Therefore, the nouns in "House Africa" are house and Africa.
It's possible you were asking about the nouns in a specific sentence that uses the phrase "House Africa." For example:
* "House Africa is a popular genre of music."
* "The party featured DJs playing House Africa music."
In these sentences, the nouns would be house Africa, party, DJs, and music.
To determine the nouns, you'll need to provide the sentence in which the phrase is used.