Is “Mesa” a Scrabble word?
Yes
MESA
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 Mesa
/ˈmeɪ.sə/
noun
1.Flat area of land or plateau higher than other land, with one or more clifflike edges.
“A few more miles of hot sand and gravel and red stone brought us around a low mesa to the Little Colorado River.”