onager /onˈə-jər/

1. The wild ass of Central Asia
2. An ancient military engine for throwing great stones

• opsonised
• opsonises
• opsonising
• opsonium
• opsoniums
• opsonize
• opsonized
• opsonizes
• opsonizing
• opt
• opt.
• optant
• optants
• optative
• optatively
• optatives
• opted
• opter
• opters
• optic
• Optic
• optical
• optical activity
• optical art
• optical character reader