Yes, syncs is a Scrabble word!
...and is worth 10 points in Scrabble, and 11 points in Words with Friends
syncs
Verb
1. Make synchronous and adjust in time or manner
What Scrabble words can I make with the letters in syncs?
4 Letter Words
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3 Letter Words
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Words that can be created with an extra letter added to syncs:
H:synchs