1. Stricken with horror
   - horrified, horror-struck

See also: afraid, 'fraid [non-standard]

• oroide
• orology
• Orono
• Orontium
• Orontium aquaticum
• oropharyngeal
• oropharynx
• orotund
• orotundity
• Orozco
• orphan
• orphan site
• orphanage
• orphaned
• orphanhood
• orphans' asylum
• orphenadrine
• Orpheus
• orphic
• orphrey
• orpiment
• orpin
• orpine
• Orpington
• Orr