Yes, masks is a Scrabble word!

Verb

1. Hide under a false appearance

2. Put a mask on or cover with a mask

3. Make unrecognizable

4. Cover with a sauce

5. Shield from light

Noun

1. A covering to disguise or conceal the face

2. Activity that tries to conceal something

3. A party of guests wearing costumes and masks

4. A protective covering worn over the face