I just did that with the word called. And I did the same with the word established. I don't need to study out the word "comfort" in Romans through Philemon because I am convinced I will find the same answer those last provided....that it can mean more than one thing.
Now, instead of sending me off to study, why don't you address how it is that Paul is ready to preach the gospel to them that are in Rome also..
Romans 1:15 So, as much as in me is, I am ready to preach the gospel to you that are at Rome also.
Romans 1:16 For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.
That Paul was called to the work....called to preach the Gospel which calls on people to believe (those that are in Rome also). 2 Thess.2:14
Another aspect of Paul's preaching - and Romans is chockful of this aspect more than any other, is 2 Timothy 4's:
1. I charge thee therefore before God, and the Lord Jesus Christ, who shall judge the quick and the dead at his appearing and his kingdom;
2. Preach the word; be instant in season, out of season; reprove, rebuke, exhort with all longsuffering and doctrine.
3. For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears;
4. And they shall turn away their ears from the truth, and shall be turned unto fables.
5. But watch thou in all things, endure afflictions, do the work of an evangelist, make full proof of thy ministry.
Preaching salvation alone is not making "full proof of thy ministry."
Thus; as Paul opens Romans he asserts that he is ready to do both: preach not only salvation, but edification.
As in 1 Corinthians 1 thru 3, one aspect saves the lost; the other establishes them, once they are saved; in the various aspects of the faith.
By the way, keep in mind I am posting to more than just you and or those posting on here.
It is why, at times, some of my words appear to be addressing someone I appear to believe needs a bit more study, or what have you.