Yes, viva is a Scrabble word!
...and is worth 10 points in Scrabble, and 12 points in Words with Friends
viva
Noun
1. An examination conducted by spoken communication
What Scrabble words can I make with the letters in viva?
3 Letter Words
2 Letter Words
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Words that can be created with an extra letter added to viva:
S:vivas