Yes, virus is a Scrabble word!
...and is worth 8 points in Scrabble, and 10 points in Words with Friends
virus
Noun
1. (virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid (DNA or RNA) wrapped in a thin coat of protein
2. A harmful or corrupting agency
3. A software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer
What Scrabble words can I make with the letters in virus?
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Words that can be created with an extra letter added to virus:
T:virtus