Yes, maxi is a Scrabble word!
...and is worth 13 points in Scrabble, and 14 points in Words with Friends
maxi
Adjective
1. Used of women's clothing having a hemline at the ankle
Noun
1. A long skirt ending below the calf
What Scrabble words can I make with the letters in maxi?
3 Letter Words
2 Letter Words