Cambridge labels “marvellous” as UK and “marvelous” as US; the spelling difference does not create a meaning difference. This guide treats the pair as a documented spelling or inflection convention rather than inventing a meaning difference where none is supported.
ReviewedEvidence1 sourceSectionEnglish Usage
Quick answer
Use “marvelous” in US English and “marvellous” in UK English.
Key details
Confusion Familyregional-variant
Rule Familyregional-orthography
TermsMarvelous, Marvellous
Variant ScopeCambridge labels “marvellous” as UK and “marvelous” as US; the spelling difference does not create a meaning difference.
Choose the right form
Decision table for Marvelous vs. Marvellous
Meaning / situation
Form / construction
Decision
US English spelling
marvelous
Use the usual US spelling.
UK English spelling
marvellous
Use the usual UK spelling.
Quick tests
Meaning / construction test
Is the document using US English spelling?
If yes: Use “marvelous.”
If no: Use “marvellous” for UK English, unless the governing house style says otherwise.
Caveat: This is a regional spelling difference, not a meaning difference.
Examples
Example
It was a marvelous performance.
The US spelling uses one l before -ous.
Example
It was a marvellous performance.
The UK spelling uses double l.
Example
The results were marvelous throughout.
The meaning is unchanged by the regional spelling choice.
Further guidance
Core difference
Use “marvelous” in US English and “marvellous” in UK English.
Style Boundary
Choose the form that matches the documented regional or lexical convention, and keep the spelling consistent while preserving official names and quoted text.
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.
Cambridge labels “counseling” as US and “counselling” as the usual UK spelling for the noun/process. This guide treats the pair as a documented spelling or inflection convention rather than inventing a meaning difference where none is supported.
Cambridge marks the verb with -ll- in UK usage and usually -l- in US usage, producing “dialled” and “dialed.” This guide treats the pair as a documented spelling or inflection convention rather than inventing a meaning difference where none is supported.
Cambridge marks the verb with -ll- in UK usage and usually -l- in US usage, so “fuelling” is the usual UK form and “fueling” the usual US form. This guide treats the pair as a documented spelling or inflection convention rather than inventing a meaning difference where none is supported.
Cambridge labels “paneling” as US and “panelling” as UK for the noun referring to fitted panels or panel material. This guide treats the pair as a documented spelling or inflection convention rather than inventing a meaning difference where none is supported.
The verb “quarrel” follows a regional doubling pattern: “quarrelled” is standard UK spelling, while “quarreled” is the usual US spelling. This guide treats the pair as a documented spelling or inflection convention rather than inventing a meaning difference where none is supported.
Cambridge marks the verb with -ll- in UK usage and usually -l- in US usage, yielding forms such as signalled/signalling and signaled/signaling. This guide treats the pair as a documented spelling or inflection convention rather than inventing a meaning difference where none is supported.
