Yes, frog is a Scrabble word!
...and is worth 8 points in Scrabble, and 9 points in Words with Friends
frog
Verb
1. Hunt frogs for food
Noun
1. Any of various tailless stout-bodied amphibians with long hind limbs for leaping; semiaquatic and terrestrial species
2. A person of French descent
3. A decorative loop of braid or cord
What Scrabble words can I make with the letters in frog?
3 Letter Words
2 Letter Words