If "verbalize" puts thoughts into spoken word, what about putting thoughts into written word?
I considered document, record, but neither capture the visualization of "writing" the way verbalize captures "speaking".
Here is an example sentence where I would like to replace verbalize:
I have always thought this, but I have never been able to verbalize the sentiment.
I am also aware, verbalize may be used, but I'd like to use something more explicitly indicating writing.