Yes, comment is a Scrabble word!

Verb

1. Make or write a comment on

2. Explain or interpret something

3. Provide interlinear explanations for words or phrases

Noun

1. A statement that expresses a personal opinion or belief or adds information

2. A written explanation or criticism or illustration that is added to a book or other textual material

3. A report (often malicious) about the behavior of other people