Mustache is the US spelling of the French word moustache, which was derived from the Italian word mostacchio that came from the Greek mustaki.
The word "mustache" has 2(two) syllables in it.
The French word moustache is a cognate and means mustache.
I combed my mustache after my shower.
Mustache Whiskers Bristles
Yes, both spellings (moustache, mustache) have a short U and a short A sound.
Because without his mustache he would look weird
Hitler's mustache.
mustache aficionado
"Safam" (שפם).
The OU pair is pronounced as a short U (uh) in English, the A is a short A (ah) and the E is silent. The other common English spelling, mustache, recognizes the U sound.
Earl Hickey has a thick moustache.
It is probably short for a mustache. Example: "You have a bit of a tash growing there."