The Hawaiian alphabet is a, e, i, o, u, h, k, l, m, n, p, w, and '
The w can sometimes be pronounced as a v. An example is wikiwiki (quickly) which sounds like vikiviki. On the other hand Wahiawā (place of noise) is pronounced with the w sound.
' is called an 'okina and marks a pause in saying the word. An example is the word mo'i (high chief) which is pronounced mo-e.
Some Hawaiian vowels have a stress line over the vowel. This stress line is called a macron or a kahakō. The line over the vowel means the sound should be said longer and stronger.