Yes, xi is a valid Scrabble word.
Is IX a Scrabble word?
IX is not a valid scrabble word.
Is XI in the Oxford English dictionary?
xi noun - Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com.
What goes with Xi in Scrabble?
Words That Contain XIaxil.axis.exit.ixia.maxi.oxic.oxid.oxim.
Is Xu a valid Scrabble word?
Yes, xu is a valid Scrabble word.