Is “Hornbook” a Scrabble word?
Yes
HORNBOOK
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 Hornbook
noun
1.A single page containing the alphabet, covered with a sheet of transparent horn, formerly used for teaching children to read.
2.A legal textbook that gives a basic overview of a particular area of law.