Just the way you have spelt it in your question: ninety.
It seems like there may be a typo in your question. Did you mean to ask how to spell a different word correctly? If you provide the word you would like assistance with, I can help you spell it correctly.
ninety nine
The word, locally, is spelt correctly in the question.
The word is correctly spelled "background".
Nineteen Hundred and Ninety-five
ninety-one
the ninety-first
The word form is five hundred ninety-three and ninety-eight hundredths.
ninety-one dollars and ninety-eight cents.
Ninety three and five hundredths.
You spelled it correctly.
That is the correct spelling.
You spelled it correctly.
You have spelled it correctly.
bye
There is no such word as 'deaserd' - did you spell it correctly ?
Sardoodledum.