loaner

One that lends something.

Something, such as a motor vehicle or laptop computer, that is loaned, often as a substitute for an item being repaired.

someone who lends money or gives credit in business matters.

Something borrowed or lent.

one who loans; a lender

something that is frequently loaned

someone who lends money or gives credit in business matters

a car that is lent as a replacement for one that is under repair