What’s the difference between "research" and "discovery"?

Two pillars of user experience legwork -- research and discovery*. But what's the difference between them, really?

In practice, I've heard the terms used nearly interchangeably, and sometimes it feels like "discovery" is invoked as just a fancy way of saying research. One answer that a quick Google search uncovered: in research we seek something specific, whereas discovery is open-ended in what we're trying to find. True?

And of course, in a dictionary sense, there's a clear difference between to research and to discover. When it comes to UX, though, do we mean something particular or different as it relates to our work, our methods, our process?

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*Not to be confused with discovery as it relates to affordance.