Is “Rheas” a Scrabble word?
Yes
RHEAS
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 Rheas
/ˈɹiːəz/
noun
1.A large flightless bird of the genus Rhea, native to South America.