Yes, says is a Scrabble word!
...and is worth 7 points in Scrabble, and 6 points in Words with Friends
says
Verb
1. Express in words
2. Report or maintain
3. Express a supposition
4. Have or contain a certain wording or form
5. Give instructions to or direct somebody to do something with authority
6. Speak, pronounce, or utter in a certain way
7. Communicate or express nonverbally
8. Utter aloud
9. State as one's opinion or judgement; declare
10. Recite or repeat a fixed text
11. Indicate
Noun
1. The chance to speak
What Scrabble words can I make with the letters in says?
3 Letter Words
2 Letter Words