For the last five years, I have been going through the Greek text of Romans (the focus of my M.Th./Ph.D. research) with a fine-tooth comb. I have worked through the text of Romans so much that I feel like it is my own kid!
I decided some time ago to compile a sequential vocabulary list for every word that appeared in Romans, complete with glosses, etc. After spending a few time-consuming weeks on it, I discovered that I could do the same thing with no more than three clicks through Logos Software. The advantage of technology. 🙂
So, if you are interested in diving into the Greek text of Romans (a venture I highly recommend–just make sure you handle φύσις in Rom 2:14 with care!), then feel free to download and print off the list: Greek Word List__Romans
NB: The words listed are sequential (in the order they appear in the text), and I have not yet taken the time to insert the chapter/verse notations (empty space in the far right column). I plan to do that at a later date, as well as fix a few formatting issues. At any rate, if you see anything missing or errors in general, please let me know.