But one day vs Nonetheless

When to use each in English, with meaning, register, and examples.

But one day

Top 2,000 (common)

Nonetheless

Top 2,000 (common)C1adverb
 But one dayNonetheless
Pronunciation🇬🇧 //bʌt wʌn deɪ//🇺🇸 //bʌt wʌn deɪ//🇬🇧 /["/ˌnʌnðəˈles/"]/🇺🇸 /["/ˌnʌnðəˈles/"]/
MeaningA phrase used to introduce a story or change in events.In spite of that; however.
ExampleBut one day, everything changed when the storm hit the village.The book is too long but, nonetheless, informative and entertaining.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR level-C1
Part of speechadverb
Collocationsbut one day my life changed, but one day everything went wrong, but one day she leftnonetheless acknowledge, nonetheless consider, nonetheless important
Antonyms-therefore, consequently
Common mistakesUsing it in formal academic writing., Placing it in the middle of sentences instead of at the start., Confusing it with 'however' or other conjunctions.Using 'nonetheless' where 'but' would suffice., Misplacing 'nonetheless' within a sentence., Confusing 'nonetheless' with 'nevertheless'; both are similar but 'nonetheless' is slightly more formal.
Usage notesCommonly used in storytelling to indicate a turn or pivotal moment. It's suitable for informal and formal narratives but might feel out of place in direct, factual writing.Use 'nonetheless' to contrast or show that something is true despite what has been said. More common in written English; less suitable for casual spoken conversations.

See it in real clips

But one day
Nonetheless

Frequently asked questions: But one day vs Nonetheless

What's the difference between But one day and Nonetheless?

But one day: A phrase used to introduce a story or change in events. Nonetheless: In spite of that; however.

Can you show an example of each?

But one day: But one day, everything changed when the storm hit the village. Nonetheless: The book is too long but, nonetheless, informative and entertaining.

Can I use But one day and Nonetheless interchangeably?

Not always. But one day and Nonetheless are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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