How Do You Spell VOWELL?
Pronunciation: [vˈa͡ʊɛl] (IPA) 
The spelling of "vowell" may seem unusual, but it is actually a legitimate variant of "vowel." The extra "l" serves to indicate that the "o" and "w" form a digraph, a pair of letters representing a single sound. In phonetic transcription, the word can be represented as /ˈvaʊəl/, with the symbol "ə" representing the schwa sound, which is a weak, unstressed vowel sound. So, in essence, "vowell" is simply a different way to spell the sound of the word "vowel."
