We can get omniJS to generate a table of all the defined names in the global name-space of a document portfolio.
Applying a generic rendering function to this:
we can get a simple table which shows that the global namespace in a freshly opened document contains over a hundred bound names. Some of them for standard JS objects, and some of them (Filltype onwards) for omniJS objects which provide the scripting interface to OmniGraffle: