Nineth or ninth? Many writers pause over this spelling, and a quick glance at the word often does not settle it. The answer is short, but the reason behind it helps you spell other number words with confidence.
This article explains which form is correct, why the other one looks right and how to remember the rule. You will also see clear examples, the main meanings of the word and answers to common questions.
Quick Answer: Ninth Is Correct
Ninth is the correct spelling. Nineth is a misspelling. The word for the ordinal number 9th drops the silent e from nine before it adds th.
Nineth vs Ninth at a Glance
| Form | Correct? | Example | Note |
|---|---|---|---|
| ninth | Yes | She finished ninth in the race. | Standard spelling |
| 9th | Yes | He lives on the 9th floor. | Numeral form |
| nineth | No | The nineth day was cold. | Common misspelling |
| nineteenth | Yes | Her nineteenth birthday is soon. | Keeps the e |
The examples in the table are illustrations written for this article.
Nineth or Ninth: Why Only One Spelling Works
Ordinal numbers show position in a list. First, second and third come before ninth, and each one follows its own pattern. Most others simply add th to the number, as in fourth, sixth and tenth.
How the Word Is Formed
The word comes from nine plus the ending th. The final e in nine is silent, and it disappears when the ending is added. That gives you ninth, with no e between the n and the t.
Other number words work the same way. Twelve becomes twelfth, and the e vanishes there too. Eight becomes eighth, which also shows how these endings can shift a word slightly.
Why So Many People Write Nineth
Nine ends in a clear e on the page. It feels natural to keep that letter when you add th. Writers also tend to copy the pattern of seventh or tenth, where the base word stays whole.
The word nineteenth adds to the confusion. It does keep the e, because it grows from nineteen and not from nine. Only the short word ninth loses it.
A Simple Way to Remember
Say the word aloud. Ninth has one syllable, so it sounds like the word nine with a quick th at the end. Nineth would suggest two syllables, and that is not how people say it.
You can also remember a short rule. Nine loses its e before th, but nineteen keeps it.
What Ninth Means and How It Is Used
Ninth has a few common uses. Context usually makes the meaning clear.
As an ordinal word, it describes the item that comes after the eighth and before the tenth. You can use it as an adjective, as in the ninth chapter. You can also use it as a noun, as in he came in ninth.
As a fraction, a ninth means one of nine equal parts of something. If you cut a cake into nine equal slices, each slice is a ninth of the cake. Music also uses the word for an interval that spans nine notes of a scale.
Examples of Ninth in Sentences
These examples are written for illustration. They show how the word fits into everyday writing.
- She sat in the ninth row of the hall.
- The team scored in the ninth minute.
- A ninth of the budget went to training.
- Our appointment is on the ninth of the month.
Common Mistakes to Avoid
The main mistake is writing nineth in place of ninth. Spellcheck tools may flag it, but not every tool does, so a quick check helps. Proofread important documents such as essays, forms and emails.
Another mistake is mixing numerals and words in one list. Style guides differ on when to write 9th and when to write ninth. Pick one approach and keep it the same across the whole piece.
A third mistake is changing nineteenth to ninteenth or nineteenth to nineteeth. Keep the full word and the correct ending.
Conclusion
Ninth is the only correct spelling of the ordinal number 9th, and nineth is a mistake. The silent e in nine falls away before the th ending. This is the same change you see in twelve and twelfth. Longer words such as nineteenth keep their e because they grow from a different base word.
A few habits make the spelling easy to remember. Say the word aloud and check that it has one syllable. Picture the short rule too: nine loses its e, but nineteen keeps it. If you are unsure, look at a trusted dictionary before you publish.
Small spelling errors can weaken an otherwise strong essay, email or web page. Take a moment to proofread numbers and ordinal words, especially in formal work. With the rule in mind, you can write ninth with confidence every time.
FAQs About Nineth and Ninth
Is nineth a word?
No, nineth is not a word. It is a common misspelling of ninth. The correct form names the position after eighth and before tenth, so use ninth in all your writing.
How do you write 9th in words?
Write it as ninth. Both 9th and ninth are correct, but they suit different situations. Use the numeral in dates, lists and tables. Use the word in formal sentences or when your style guide asks for it.
Why is there no e in ninth?
The silent e in nine drops away when you add th. Twelve and twelfth follow the same pattern. So the spelling is not an exception. It is a regular change in how English forms ordinal numbers.
Is nineteenth spelled with an e?
Yes, nineteenth keeps its e. It grows from nineteen, which ends in teen, so the e stays in place. Only the short word ninth drops the e.
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