Yes, lysins is a Scrabble word!
...and is worth 9 points in Scrabble, and 10 points in Words with Friends
lysins
Noun
1. Any substance (such as an antibody) or agent that can cause lysis
What Scrabble words can I make with the letters in lysins?
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words