Apartment- a set of rooms for living in, especially on one floor of a building
Noun- I'll give you the keys to my apartment.
Bungalow- a house that usually has only one storey (= level), sometimes with a smaller upper storey set in the roof and windows that come out from the roof
Noun- There were small, white bungalows dotted over the hillside.
Cave- a large hole in the side of a hill, cliff, or mountain, or one that is underground
Noun- She was crushed in a freak accident in a cave in France.