Yes, prop is a Scrabble word!
...and is worth 8 points in Scrabble, and 10 points in Words with Friends
prop
Verb
1. Support by placing against something solid or rigid
Noun
1. A support placed beneath or against something to keep it from shaking or falling
2. Any movable articles or objects used on the set of a play or movie
3. A propeller that rotates to push against air
What Scrabble words can I make with the letters in prop?
3 Letter Words
2 Letter Words