>>6945455Yes there is, the vowel in "while" is a combination of the two individual sounds "ah" and "ee": "ai", thus, a diphthong.
The sound "ai" as in pride, wide, and while, and the sound "ei" as in may, ray, and whale, the sound "oi" as in boy, toy, and boil, the sound "au" as in now, brow, and power all are diphthongs.