infidel /inˈfi-del or -dl/

1. Someone who rejects a religion, esp Christianity or Islam
2. Loosely, someone who disbelieves in a particular theory, etc

1. Unbelieving
2. Sceptical
3. Disbelieving a religion

infidelˈity noun

1. Lack of faith or belief
2. Disbelief in religion
3. Unfaithfulness, esp in marriage
4. An instance of this
5. Treachery

• sanitarily
• sanitariness
• sanitarist
• sanitarists
• sanitarium
• sanitariums
• sanitary
• sanitary cordon
• sanitary engineer
• sanitary engineering
• sanitary engineers
• sanitary inspector
• sanitary inspectors
• sanitary napkin
• sanitary napkins
• sanitary towel
• sanitary towels
• sanitary ware
• sanitary wares
• sanitate
• sanitated
• sanitates
• sanitating
• sanitation
• sanitationist