vincible /vinˈsi-bl/

That may be overcome

vincibilˈity noun

• doctorands
• doctorate
• doctorated
• doctorates
• doctorating
• doctored
• doctoress
• doctoresses
• doctor-fish
• doctor-fishes
• doctorial
• doctoring
• doctorly
• Doctor of the Church
• doctors
• Doctors' Commons
• doctorship
• doctorships
• doctor's stuff
• doctress
• doctresses
• doctrinaire
• doctrinaires
• doctrinairism
• doctrinairisms