• phonebook,
• phonbook,
• phoenbook,
• Hordoak,
• Hornbeek,
• gornbook,
• bornbook,
• nornbook,
• jornbook,
• uornbook,
• yornbook,
• hirnbook,
• hkrnbook,
• hlrnbook,
• hprnbook,
• h0rnbook,
• horbook,
• hornook,
• hornbok,
• hornboo

• handbook.

The adjective form of the word "Hornbook" is "hornbookish".

The plural of the "Hornbook" can be the "hornbooks".

The singular of the "Hornbook" can be the "Hornbook".