There is that.
And there is the study of a thing beyond that; as an entire study or doctrinal subject.
I meant, not simply a word study, but more a doctrinal one.
In this, the Apostle Paul's "chief of sinners...in me first" is just that - an entire doctrine.
Like Soteriology, or Angelology, or some of the other "ologies" are each an entire doctrine beyond the study of the tense, etc., of a few words, that also comprise mini-doctrines within each of them.
It's a distinction I ran across years ago, while observing how different Mid-Acts based assemblies study things out.
Some of them would focus on the Greek of each passage over a series of studies.
Others would mostly focus on a doctrinal study - on the doctrine of this or that.
When you observe one of those messages where the Pastor or Teacher is going "come with me to this passage over here, and also this other one over here, and this one over here" for an hour or so, that is usually a doctrinal study - all the passages sharing a same particular doctrine (or teaching on a thing) that together, paint a fuller picture of the subject being studied out.
As when one goes through all those passages in the OT, just to get at, or bring out a much more richer sense, say, of John 10's "other sheep, not of this fold" - which is actually a doctrine within Israelology that Israel had been expected to understand.
That sort of thing.
I suspect this is partly why the soundbyte approach on a forum so often fails.
The result of that is like handing someone some random piece out of a jigsaw puzzle.
Anyway, hope that clears up what I'd meant
Rom. 5:8