Nineth or Ninth? Ninth is the correct spelling; nineth is a common misspelling and should not be used.
Have you ever wondered whether you should write “nineth” or “ninth”? You’re not alone. Many students, writers, and English learners search for “nineth or ninth” because they are not sure which spelling is correct. Since the number nine ends with the letter E, it may seem natural to add -th and write nineth. However, English follows a different spelling rule for this ordinal number.
The correct spelling is ninth, not nineth. The E is removed before adding -th, so the correct spelling is ninth. This is the spelling used in dictionaries, schools, books, and official writing. Many people write nineth by mistake because it sounds similar when spoken.
This guide explains the difference between nineth and ninth in simple words. You will learn the correct spelling, the meaning of the word, how people use it in British and American English, common mistakes, and easy everyday examples. By the end of this guide, you will know why ninth is the only correct spelling and how to use it correctly in your writing.
Nineth or Ninth: Quick Answer
Correct spelling: ✅ Ninth
Incorrect spelling: ❌ Nineth
Ninth is the correct ordinal form of the number nine.
Examples
- ✅ Today is the ninth of July.
- ✅ She finished in ninth place.
- ✅ He is in the ninth grade.
- ❌ Today is the nineth of July.
Quick Tip:
The E in nine is removed before adding -th.
Nine → Ninth
The Origin of Nineth or Ninth
The word ninth comes from Old English nigotha, which later became ninth in Modern English.
Like many English ordinal numbers, its spelling changed over time.
Examples include:
- Five → Fifth
- Twelve → Twelfth
- Nine → Ninth
Instead of simply adding -th to nine, English drops the E, resulting in ninth.
The spelling nineth developed because many people assumed the pattern should be:
Nine + th = Nineth
However, English grammar and historical spelling rules do not support this form.
British English vs American English Spelling
There is no spelling difference between British English and American English.
Both use ninth.
| Feature | British English | American English |
| Correct spelling | Ninth | Ninth |
| Incorrect spelling | Nineth | Nineth |
| Ordinal number | Ninth | Ninth |
Examples
British English
- She came ninth in the race.
American English
- He is in the ninth grade.
Both countries use the same spelling.
Which Spelling Should You Use?
Always use ninth.
If your audience is in the United States
Use ninth.
If your audience is in the United Kingdom
Use ninth.
If your audience is in Canada, Australia, or New Zealand
Use ninth.
If your audience is global
Always choose ninth, as it is the accepted spelling worldwide.
Common Mistakes with Nineth or Ninth
Many writers make similar mistakes.
| Incorrect | Correct |
| Nineth | Ninth |
| Nineth grade | Ninth grade |
| Nineth place | Ninth place |
| Nineth birthday | Ninth birthday |
Why does this happen?
People often think the word follows this pattern:
Nine + th
But English removes the E before adding -th.
Easy Rule to Remember
- Five → Fifth
- Nine → Ninth
- Twelve → Twelfth
Some ordinal numbers change their spelling rather than simply adding -th.
Nineth or Ninth in Everyday Examples
Our meeting is scheduled for the ninth of August.
News
The runner finished in ninth place.
Social Media
Happy ninth birthday!
Formal Writing
The committee held its ninth annual meeting.
School Writing
My daughter is in the ninth grade this year.
Nineth or Ninth: Google Trends & Usage Data
Search engines receive thousands of searches for “nineth or ninth” every year.
General search patterns show:
- Ninth is overwhelmingly more popular in all English-speaking countries.
- Nineth appears mainly as a spelling mistake.
- Students often search for the correct spelling while completing homework.
- English learners commonly confuse the word because of the spelling of nine.
Modern spelling and grammar tools all say that ninth is the correct spelling.
Comparison Table
| Word | Correct? | Meaning |
| Ninth | ✅ Yes | Ordinal form of nine |
| Nineth | ❌ No | Incorrect spelling |
| Nine | ✅ Yes | Cardinal number |
| Ninthly | ✅ Rare | In the ninth position (rare usage) |
FAQs
Is “nineth” ever correct?
No. Nineth is always a misspelling.
Why is it spelled “ninth” instead of “nineth”?
English drops the E from nine before adding -th.
Is “ninth” correct in British English?
Yes. British English and American English both use ninth.
What is the ordinal form of “nine”?
The correct ordinal form is ninth.
How do you spell “ninth grade”?
The correct spelling is ninth grade.
Why do people write “nineth”?
This happens because many people add -th to nine without following the correct spelling rule.
Is “ninth” used in formal writing?
Yes. Ninth is correct in academic, business, legal, and everyday writing.
Conclusion
Understanding the difference between nineth and ninth is easy once you know the spelling rule. Ninth is the only correct spelling. It is used in dictionaries, schools, books, official documents, and everyday English.Many people write nineth because it comes from the word nine, but this spelling is incorrect. In English, the E is dropped before adding -th, so nine becomes ninth. The same spelling rule is used in words like fifth and twelfth, which also change their spelling.
Many people write nineth because it comes from the word nine, but this spelling is incorrect. In English, the E is dropped before adding -th, so nine becomes ninth. The same spelling rule is used in words like fifth and twelfth, which also change their spelling.
There is no difference between British English and American English. Both use ninth as the correct spelling.
Use ninth when writing about dates, school grades, birthdays, competitions, or rankings. It is the correct spelling and makes your writing clear and correct.
If you are not sure whether to write nineth or ninth, remember this simple rule: nine becomes ninth, not nineth. This easy rule will help you spell the word correctly and improve your English writing.
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Ali Hassan is an English grammar enthusiast who shares simple grammar lessons, spelling guides, and practical writing tips to help learners improve confidently.