Today’s Parola del giorno is the adverb di sopra. It can also be written as a single word disopra, although this usage is older (but you might see it in older books/literature). It can also be used as an invariable adjective.
See the word used below:
Da me la cucina e il salotto sono di sotto mentre le stanze da letto e il bagno sono di sopra.
At my house the kitchen and living room are downstairs while the bedrooms and bathroom are upstairs.