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

• trithionic
• trithionic acid
• tritiate
• tritiated
• tritiates
• tritiating
• tritiation
• tritiations
• tritical
• triticale
• triticales
• tritically
• triticalness
• triticalnesses
• triticeous
• triticism
• triticisms
• Triticum
• tritide
• tritides
• tritium
• tritiums
• Tritoma
• triton
• Triton