You added an acknowledgements page to your book, then a US editor asked why you spelled it wrong but you hadn’t.
Here’s the quick fix: acknowledgment (no middle e ) is standard American English, and acknowledgement (with a middle e ) is standard British English.
This follows the same silent-e pattern you’ll find in words like judgment/judgement and aging/ageing.
Once you understand this one rule, all three of these tricky word pairs make sense together.
Quick Answer
Acknowledgment (no middle e ) is the standard spelling in American English.
Acknowledgement (with a middle e ) is the standard spelling in British English, Australian English, and most Commonwealth countries.
Both describe the same thing: recognizing or confirming something formally.
⚡ Quick Rule
America drops the silent e before adding -ment ; Britain keeps it — that’s the whole rule.
Acknowledgment vs Acknowledgement: The Core Difference
Acknowledgment and acknowledgement mean exactly the same thing: a formal recognition or confirmation of something.
American English drops the silent e from acknowledge before adding -ment, creating acknowledgment.
British English keeps the silent e, creating acknowledgement instead.
This single letter difference is the entire distinction between the two spellings.
Why Do Both Spellings Exist? The Silent-E Rule Explained
English generally drops a silent e before a suffix starting with a vowel, but keeps it before a suffix starting with a consonant, like -ment.
By that standard rule, acknowledge plus -ment should logically keep the e, since -ment starts with a consonant.
American English broke this general pattern for a small group of words, simplifying the spelling by dropping the e anyway.
British English followed the more traditional, rule-consistent path, keeping the e in acknowledgement, just as it does in judgement.
Acknowledgment vs Acknowledgement Comparison Table
| Feature | Acknowledgment | Acknowledgement |
| Meaning | Formal recognition or confirmation | Formal recognition or confirmation |
| American English | ✅ Standard | Rare |
| British English | Less common | ✅ Standard |
| Australian English | Rare | ✅ Standard |
| Canadian English | Sometimes used | More common |
| Pronunciation | Same | Same |
| Grammar | Correct | Correct |
Memory Trick
Remember: America simplifies things, dropping the e — acknowledgment.
Britain keeps tradition alive, preserving the e — acknowledge-ment, with the root word fully visible.
If you already remember judgement keeps its e in British English, acknowledgement follows the exact same logic.
Real Example Sentences
American English (Acknowledgment):
- We received your acknowledgment of the contract.
- She sent a quick acknowledgment of the email.
- His acknowledgment of the mistake surprised everyone.
- The company issued a formal acknowledgment of the delay.
- I appreciate your acknowledgment of my hard work.
British English (Acknowledgement):
- We received your acknowledgement of the contract.
- She sent a quick acknowledgement of the email.
- His acknowledgement of the mistake surprised everyone.
- The company issued a formal acknowledgement of the delay.
- I appreciate your acknowledgement of my hard work.
Acknowledgment of Receipt and the Book Acknowledgments Section
Acknowledgment of receipt (US) or acknowledgement of receipt (UK) refers to a formal confirmation that a document, payment, or delivery was received.
The acknowledgments section in a book, where authors thank people who helped them, follows the same regional spelling pattern.
American books typically use Acknowledgments as the section title, while British books typically use Acknowledgements.
Even in this specific publishing context, the spelling still follows standard regional convention.
Similar Silent-E Words: Judgement, Aging
Acknowledgement isn’t the only British word that keeps a silent e where American English drops it.
Judgment (US) vs Judgement (UK): Britain keeps the e here too, following the same underlying pattern, outside legal writing.
Aging (US) vs Ageing (UK): American English drops the silent e before -ing, while British English keeps it.
These words share a pattern: British English often preserves letters closer to the original root word, while American English trims them for simplicity.
Around the World: Where Each Spelling Is Used
| Country | Preferred Spelling |
| United States | Acknowledgment |
| United Kingdom | Acknowledgement |
| Canada | Usually Acknowledgement |
| Australia | Acknowledgement |
| New Zealand | Acknowledgement |
| Ireland | Acknowledgement |
Canada leans toward the British spelling here, similar to its pattern with judgement and colour.
Common Mistakes
1. Mixing both spellings in one document Incorrect: We sent our acknowledgment, and they sent their acknowledgement back. Correct (US): We sent our acknowledgment, and they sent their acknowledgment back.
2. Assuming this follows the same rule as travelling/labelled This is a different rule — acknowledgement is about keeping a silent e, not doubling a consonant.
3. Misspelling the word by dropping the d Incorrect: acknowlegment Correct: acknowledgment (US) or acknowledgement (UK)
4. Forgetting the book Acknowledgments section follows the same rule American books use Acknowledgments ; British books use Acknowledgements, matching regional spelling elsewhere.
When to Use Each Spelling
Use Acknowledgment When:
- Writing for an American audience
- Following AP Style or Chicago Manual of Style
- Writing US business or legal correspondence
Examples: acknowledgment of receipt, formal acknowledgment, brief acknowledgment
Use Acknowledgement When:
- Writing for British, Australian, or NZ readers
- Following Oxford or British publishing standards
- Writing for most Canadian readers
Examples: acknowledgement of receipt, formal acknowledgement, brief acknowledgement
FAQs
Is it acknowledgment or acknowledgement?
Both are correct. Acknowledgment is standard American English, while acknowledgement is standard British English.
Is acknowledgment the American spelling?
Yes. American dictionaries, schools, and style guides recommend acknowledgment, without the middle e.
Is acknowledgement used in the UK?
Yes. It’s the standard spelling in British English and also common in Australia, New Zealand, and Canada.
Do acknowledgment and acknowledgement mean different things?
No. Both describe the same concept: a formal recognition or confirmation of something.
Why does British English keep the e ?
British English follows the more traditional spelling pattern, preserving the e from the root word acknowledge.
Is one spelling more correct than the other?
No. Neither spelling is more correct — match your spelling to your audience and stay consistent.
How do I remember which spelling to use?
Think: America drops the e for simplicity; Britain keeps it, just like in judgement.
What does acknowledgment of receipt mean?
It refers to a formal confirmation that a document, payment, or delivery has been received.
Is it Acknowledgments or Acknowledgements in a book?
American books typically use Acknowledgments. British books typically use Acknowledgements.
Do judgement/judgment and acknowledgement/acknowledgment follow the same rule?
Yes, both word pairs follow the same silent-e pattern, with American English dropping the e that British English keeps.
Conclusion
Acknowledgment and acknowledgement are both correct spellings of the same word.
American English drops the silent e for simplicity, while British English keeps it, following the same pattern as judgement.
Once you understand this rule, all three related word pairs become easy to spell with confidence.
Hi, I’m Sophia Bennett. My goal is to make grammar easy, clear, and useful through simple explanations and real-life examples.
