Is “Rex” a Scrabble word?
Yes
REX
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 Rex
noun
1.An animal which has a genetic recessive variation that causes the guard hairs to be very short or fully lacking.