Just the way you have spelt it in your question: ninety.
The word is correctly spelled "background".
The word, locally, is spelt correctly in the question.
pedikulosis is the correct spelling.
The word for walking with a limp is correctly spelled, limping.
That is the correct spelling of the number ninety(90).
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 point zero five.
Sardoodledum.
You spelled it correctly.
You spelled it correctly.
There is no such word as 'deaserd' - did you spell it correctly ?
bye
That is the correct spelling.
You have spelled it correctly.