English UsageComparison guide
Skeptic vs. Sceptic
Cambridge labels “skeptic” mainly US and “sceptic” UK for a person who doubts the truth or value of an idea or belief.
Use “skeptic” mainly in US English and “sceptic” in UK English.
Key details
Confusion Familyregional-spelling-and-sense
Rule Familyregional-orthography
Termsskeptic, sceptic
Variant ScopeCambridge labels “skeptic” mainly US and “sceptic” UK for a person who doubts the truth or value of an idea or belief.
Further guidance
Core difference
The two spellings represent the same documented noun sense.
Fast Test
Identify the intended sense first, then apply the documented regional or domain spelling for that sense.
Variant Boundary
Related forms such as skeptical/sceptical and skepticism/scepticism follow their own documented regional spellings; keep house style consistent.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Skeptic — Cambridge Dictionary (opens in a new tab)Cambridge Dictionary · Skeptic entry labeling skeptic mainly US and sceptic usually UK
- Sceptic — Cambridge Dictionary (opens in a new tab)Cambridge Dictionary · Sceptic entry labeling sceptic UK and skeptic US