Yes, storekeeper is a compound word store and keeper.
supermarket
The family went to the supermarket to purchase groceries.
You might buy the Sunday Times at a newsstand, drugstore or the supermarket.(The original version of this question specified a word with the vowel sound of the word "moon" which is the long OO heard in "news" and "newsstand.")
Faleoloa
He buys all of his birthday cards at the supermarket, not at the card store. The boy was hired to bag groceries at the supermarket.
Depending on context, supermarket can be translated as:Supermarkt,VerbrauchermarktKaufhalle (east Germany)
No, building is not a compound word.
El Mercado
supermarket
The contraction (not a compound word) is doesn't.
Upwards is a compound word.
There is no compound word.A compound word is a word like bus-stop.Husban is spelt like this husband