Synonyms of infidelity

infidelity

noun

ˌin-fə-ˈde-lə-tē 

1

as in adultery

lack of faithfulness especially to one's husband or wife

infidelity can lead to divorce

Synonyms & Similar Words

• adultery
• betrayal
• disloyalty
• faithlessness
• unfaithfulness
• perfidy
• treachery
• inconstancy
• falseness
• perfidiousness
• deception
• falsity
• lying
• deceit
• treason
• duplicity
• double-dealing
• sellout
• double cross

Antonyms & Near Antonyms

• fidelity
• loyalty
• faith
• devotion
• faithfulness
• allegiance
• constancy
• fealty
• reliability
• steadfastness
• devotedness
• dependability
• honesty
• trustworthiness
• staunchness

2

as in betrayal

the act or fact of violating the trust or confidence of another

the one thing that the political boss will not forgive is infidelity

Synonyms & Similar Words

• betrayal
• treachery
• treason
• unfaithfulness
• deception
• faithlessness
• disloyalty
• perfidy
• backstabbing
• abandonment
• falseness
• deceit
• lying
• double cross
• falsity
• two-timing
• sellout
• business
• desertion
• duplicity
• fraud
• double-dealing
• informing
• trickery
• guile
• two-facedness
• snitching
• talebearing

Antonyms & Near Antonyms

• fidelity
• loyalty
• faithfulness
• devotion
• allegiance
• steadfastness
• fealty
• reliability
• trustworthiness
• dependability
• defense
• protection
• staunchness
• shield
• safeguard

3

as in misconduct

a sexual encounter or relationship between a married person and someone other than their spouse

had known about his wife's infidelities for years

Synonyms & Similar Words

• adultery
• misconduct
• cheating
• unfaithfulness
• treachery
• affair
• promiscuity
• two-timing
• romance
• faithlessness
• disloyalty
• perfidy
• love
• intrigue
• infatuation
• inconstancy
• criminal conversation
• falseness
• free love
• flirtation
• love affair
• amour
• perfidiousness
• entanglement
• fling
• attachment
• liaison
• passion

Antonyms & Near Antonyms

• fidelity
• faithfulness
• loyalty
• devotion
• dedication
• allegiance
• constancy
• steadfastness
• fealty
• devotedness

Example Sentences

Recent Examples of infidelity

The garment, which went on public display Friday at Sotheby’s in London, was worn by Diana on June 29, 1994, the broadcast date of an interview in which the then-Prince Charles acknowledged infidelity. — ABC News, 18 Sep. 2026

Just days later, Bullock and James separated following reports of his infidelity, and Bullock raised Louis as a single mom. — Allison Degrushe, StyleCaster, 15 Sep. 2026

Zvyagintsev’s story, like Chabrol’s, imagines the tragic fallout of a husband discovering his wife’s infidelity. — David Canfield, HollywoodReporter, 14 Sep. 2026

His relationship with his wife (Anna Faris) and kids is disintegrating and a National Enquirer journo keeps threatening to run an exposé of his infidelities. — Jessica Kiang, Variety, 5 Sep. 2026