How To Pronounce Ninth

In British English, ninth is pronounced /naɪnθ/. The narrow phonetic transcription is [na͠ɪn̪θ]. In American English, it is pronounced /naɪnθ/.

Ninth has one syllable. British and American speakers say it the same way.

Slashes / / show the phonemic transcription, the sounds that change meaning. Square brackets [ ] show the phonetic transcription, with the finer detail of how the sounds are actually made.