Select the INCORRECTLY spelt word.

Auxiliary Inauguration  Immediately  Moustach

Moustach

The incorrectly spelled word is Moustach. The correct spelling is Moustache. Auxiliary means helping or providing assistance. Inauguration is the formal act of beginning or starting something. Immediately means without delay or hesitation. Moustache is a strip of hair that grows above the upper lip of a man.