AlanX, you wouldn't say to a friend in English
Pardon me, but would you have the graciousness to answer my query?
No, you'd say
Dude, answer my question.
That's the difference between "written only" and "spoken only." They're not hard and fast rules, but probably should be termed "formal" and "regular."
I've never encountered a word that
only may be written or spoken.
Edit: Well, I suppose 東京特許許可局 might be written but not spoken
wwwwww