Wow. Thanks for "correcting" me. How very helpful. I don't know if you're posting to add to the general knowledge or if you think you're clearing up some sort of mystery, but either way, you failed. Not to mention I had already said what you were trying to say.
Such as: "anything that starts with hydro or oxy and/or ends with -one, metabolizes into something similar, but different to morphine." Its the same thing you said, only broader and more eloquent.
Everything that comes from the poppy does not break down into morphine. Codeine does... and thats it. A lot of opium alkaloids look nothing like morphine at all. Yeah, all opiates, synthetic or not, break down into different things. Something that is codeine-like will be demethylated at the 3-position, N-demethylated, then finally conjugated with glucuronic acid. Some other things can happen, but those are the main three when it comes to morphine- and codeine-like opioids.
You could check it out tonight, read what all the all the synthetics are metabolized into, but rather than read a list, its just better to know the science behind it and you could guess what each metabolite is. For example, you knew that oxycodone was metabolized to oxymorphone. Then you asked what hydrocodone was metabolized to. Follow the logic: codeine ---> morphine. So it would be metabolized to hydromorphone. Either way, in both of those circumstances, the amount that is metabolized to the related morphone compound is very small and barely worth considering. In research, perhaps, but for recreational use, no.
And please don't try to correct people who are already correct then give incorrect information. I recommend you read a book or fifty before trying to give advice like this. I didn't read the rest of your post, but I could fix those errors too if you wish.