H4O1R1N1B3O1O1K5
17 points
HORNBOOK is validvalid
a primer [n HORNBOOKS]
an ancient child's schoolbook comprising alphabet, digits, etc. on parchment covered with sheet of horn [n -S]
a primer [n HORNBOOKS]
an ancient child's schoolbook comprising alphabet, digits, etc. on parchment covered with sheet of horn [n -S]