Is “Ex” a Scrabble word?
Yes
EX
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Ex
/ɛks/
noun
1.The name of the Latin-script letter X.