Yes, zeugma is a Scrabble word!
...and is worth 18 points in Scrabble, and 21 points in Words with Friends
zeugma
Noun
1. Use of a word to govern two or more words though appropriate to only one
What Scrabble words can I make with the letters in zeugma?
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Words that can be created with an extra letter added to zeugma:
S:zeugmas