Yes, update is a Scrabble word!
...and is worth 9 points in Scrabble, and 11 points in Words with Friends
update
Verb
1. Modernize or bring up to date
2. Bring up to date; supply with recent information
3. Bring to the latest state of technology
Noun
1. News that updates your information
What Scrabble words can I make with the letters in update?
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words