Yes, lam is a Scrabble word!
...and is worth 5 points in Scrabble, and 7 points in Words with Friends
lam
Verb
1. Flee; take to one's heels; cut and run
2. Give a thrashing to; beat hard
Noun
1. A rapid escape (as by criminals)
What Scrabble words can I make with the letters in lam?
2 Letter Words