Yes, teff is a Scrabble word!
...and is worth 10 points in Scrabble, and 10 points in Words with Friends
teff
Noun
1. An African grass economically important as a cereal grass (yielding white flour of good quality) as well as for forage and hay
What Scrabble words can I make with the letters in teff?
3 Letter Words
2 Letter Words
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Words that can be created with an extra letter added to teff:
S:teffs