Yes, las is a Scrabble word!
...and is worth 3 points in Scrabble, and 4 points in Words with Friends
las
Noun
1. A white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
2. A state in southern United States on the Gulf of Mexico; one of the Confederate states during the American Civil War
3. The syllable naming the sixth (submediant) note of a major or minor scale in solmization
What Scrabble words can I make with the letters in las?
3 Letter Words
2 Letter Words