indefectible /in-di-fekˈti-bl/

1. Incapable of defect, flawless
2. Unfailing

• feller
• fellers
• fellest
• fellies
• felling
• fell-lurking
• fellmonger
• fellmongers
• fellness
• fellnesses
• felloe
• felloes
• fellow
• fellow citizen
• fellow citizens
• fellow-commoner
• fellow-commoners
• fellow countryman
• fellow countrymen
• fellow creature
• fellow creatures
• fellow feeling
• fellow feelings
• fellow heir
• fellow heirs