Oxycontin and oxycodone are the same thing, EXCEPT oxycodone is a quick release tablet, and oxycontin is a slow release of the same med.
Hydrocodone is the ingredient in Vicodin and
Lortab. Although they are all narcotics, vicodin and lortab are lesser strength than the oxy's and morphine. The one I'm least familiar with is tramadol, although I've certainly read a lot about it, only taken it once.