Is “Cornstarch” a Scrabble word?
Yes
CORNSTARCH
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 Cornstarch
noun
1.A very fine starch powder derived from corn (maize) used in cooking as a thickener, to keep things from sticking, or as an anti-caking agent.