mustachio vs moustache

mustachio and moustache both are nouns.

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

As nouns, moustache is a hypernym of mustachio; that is, moustache is a word with a broader meaning than mustachio:

mustachio: a large bushy moustache (with hair growing sometimes down the sides of the mouth)
moustache: an unshaved growth of hair on the upper lip

Other hypernyms of mustachio include mustache.

mustachio (noun)	moustache (noun)
a large bushy moustache (with hair growing sometimes down the sides of the mouth)	an unshaved growth of hair on the upper lip