The sound of the long O (oh) can be made in French by -eau, -aux, -eux, and -eaux, as heard in the words flambeaux and tableaux, and the Cajun name Boudreaux.
There is no word in English spelled with the four letters 'voah'.
Those letters spell noodle.
Unscrambled, the letters 'CTOONY' spell the word 'tycoon'.
If you are looking for a word that contains all five letters, it is "onion."
Those letters can be used to spell "proportional".
The letters RABNO can be rearranged to spell the word baron.
Those letters will spell the words coral or carol.
Those letters will spell tetrapods (things with four feet).
Words that you can spell with 'duoo' are do and duo.
The letters A G L O N can form:AlongAngloLogan
Tooth
Those letters will spell the word botanical.