Business in the modern age
I don't know, I think that "startup" implies quite clearly that the thing is not designed as a standalone business expected to make its own profit in a few years.
Sure, if you say your business is in a startup phase, or maybe even "do you want to invest in our startup?", fine. As soon as you say the startup IS the business, or a startup is a KIND of business, then you're talking buyout as a "strategy" once your VC dries up.