Yes, site is a Scrabble word!
...and is worth 4 points in Scrabble, and 4 points in Words with Friends
site
Verb
1. Assign a location to
Noun
1. The piece of land on which something is located (or is to be located)
2. Physical position in relation to the surroundings
3. A computer connected to the internet that maintains a series of web pages on the World Wide Web
What Scrabble words can I make with the letters in site?
4 Letter Words
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3 Letter Words
2 Letter Words