Yes, foam is a Scrabble word!
...and is worth 9 points in Scrabble, and 10 points in Words with Friends
foam
Verb
1. Become bubbly or frothy or foaming
Noun
1. A mass of small bubbles formed in or on a liquid
2. A lightweight material in cellular form; made by introducing gas bubbles during manufacture
What Scrabble words can I make with the letters in foam?
3 Letter Words
2 Letter Words