Yes, siren is a Scrabble word!

Noun

1. A sea nymph (part woman and part bird) supposed to lure sailors to destruction on the rocks where the nymphs lived

2. A woman who is considered to be dangerously seductive

3. A warning signal that is a loud wailing sound

4. An acoustic device producing a loud often wailing sound as a signal or warning

5. Eellike aquatic North American salamander with small forelimbs and no hind limbs; have permanent external gills