Yes, glow is a Scrabble word!

Verb

1. Emit a steady even light without flames

2. Have a complexion with a strong bright color, such as red or pink

3. Shine intensely, as if with heat

4. Be exuberant or high-spirited

5. Experience a feeling of well-being or happiness, as from good health or an intense emotion

Noun

1. An alert and refreshed state

2. Light from nonthermal sources

3. The phenomenon of light emission by a body as its temperature is raised

4. A feeling of considerable warmth

5. A steady even light without flames

6. The amount of electromagnetic radiation leaving or arriving at a point on a surface

7. An appearance of reflected light