I think you're looking for words like:
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Prograde - In the direction of spin.
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Retrograde - Against the direction of spin.
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Nadirial or Anti-radial - Toward the center of rotation; "Up" in your centrifugal graviation model
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Radial or Anti-Nadirial - Away from the center of rotation; "Down" in your model.
Throwing a bowling ball "prograde", it will experience greater "gravity" than normal. If you throw it retrograde, it will experience less gravity than normal, unless you throw it more than twice as fast as the prograde velocity, in which case it will experience more gravity.