Yes, flash is a Scrabble word!

Verb

1. Gleam or glow intermittently

2. Appear briefly

3. Display proudly; act ostentatiously or pretentiously

4. Make known or cause to appear with great speed

5. Run or move very quickly or hastily

6. Expose or show briefly

7. Protect by covering with a thin sheet of metal

8. Emit a brief burst of light

Adjective

1. Tastelessly showy

Noun

1. A sudden intense burst of radiant energy

2. A momentary brightness

3. A short vivid experience

4. A sudden brilliant understanding

5. A very short time (as the time it takes the eye to blink or the heart to beat)

6. A gaudy outward display

7. A burst of light used to communicate or illuminate

8. A short news announcement concerning some on-going news story

9. A bright patch of color used for decoration or identification

10. A lamp for providing momentary light to take a photograph