mustachio vs moustachio

mustachio and moustachio both are nouns.

Word	Noun	Adjective	Verb	Adverb
mustachio	Yes	No	No	No
moustachio	Yes	No	No	No

As nouns, mustachio and moustachio are synonyms defined as:

mustachio and moustachio: a large bushy moustache (with hair growing sometimes down the sides of the mouth)

Other synonyms of mustachio include handle-bars.

mustachio (noun)	moustachio (noun)
a large bushy moustache (with hair growing sometimes down the sides of the mouth)	a large bushy moustache (with hair growing sometimes down the sides of the mouth)