Yes, flush is a Scrabble word!

Adverb

1. Squarely or solidly

2. In the same plane

Verb

1. Turn red, as if in embarrassment or shame

2. Flow freely

3. Glow or cause to glow with warm color or light

4. Make level or straight

5. Rinse, clean, or empty with a liquid

6. Irrigate with water from a sluice

7. Cause to flow or flood with or as if with water

Adjective

1. Of a surface exactly even with an adjoining one, forming the same plane

2. Having an abundant supply of money or possessions of value

Noun

1. The period of greatest prosperity or productivity

2. A rosy color (especially in the cheeks) taken as a sign of good health

3. Sudden brief sensation of heat (associated with menopause and some mental disorders)

4. A poker hand with all 5 cards in the same suit

5. The swift release of a store of affective force

6. A sudden rapid flow (as of water)

7. Sudden reddening of the face (as from embarrassment or guilt or shame or modesty)