Mouthpiece vs Orifices - What's the difference?

As nouns the difference between mouthpiece and orifices

is that mouthpiece is a part of any device that functions in or near the mouth, especially while orifices is plural of orifice.

(wikipedia mouthpiece)

(en noun)

A part of any device that functions in or near the mouth, especially:

# The part of a telephone that is held close to the mouth.

# The part of a wind instrument that is held in or against the mouth.

A spokesman who speaks on behalf of someone else.

(lb) A lawyer for the defense.

(head)