Other forms: startups
The word startup refers to either the process of beginning something or a new entrepreneurial business. The startup costs for your sister's startup might be higher than she thinks.
Most startups offer their customers something innovative — a new product, like a dog toy that's truly indestructible, or an ingenious service, like a smartphone app that tells you where the closest public restrooms are. A startup begins with a great idea, is backed by investments of money, and is intended to grow very quickly — assuming it's successful.