Yes, pall is a Scrabble word!

Verb

1. Become less interesting or attractive

2. Cause to lose courage

3. Cover with a pall

4. Cause surfeit through excess though initially pleasing

5. Cause to become flat

6. Lose sparkle or bouquet

7. Lose strength or effectiveness; become or appear boring, insipid, or tiresome (to)

8. Lose interest or become bored with something or somebody

Noun

1. A sudden numbing dread

2. Burial garment in which a corpse is wrapped

3. Hanging cloth used as a blind (especially for a window)