Yes, sager is in the scrabble dictionary.

What is a Sager?

(sāj) One venerated for experience, judgment, and wisdom.

Is safer a word?

One of the most common grammar questions is about the correct comparative form of the word “safe.” Is it “safer?” or “more safe?” In the US, both forms can be used, but “safer” is more common and more correct. Grammarly uses the form “safer,” as do many other programs including Microsoft Word.