mouthpiece vs tobacco pipe

mouthpiece and tobacco pipe both are nouns.

Word	Noun	Adjective	Verb	Adverb
mouthpiece	Yes	No	No	No
tobacco pipe	Yes	No	No	No

mouthpiece (noun)	tobacco pipe (noun)
the aperture of a wind instrument into which the player blows directly	a tube with a small bowl at one end; used for smoking tobacco
the tube of a pipe or cigarette holder that a smoker holds in the mouth
an acoustic device; the part of a telephone into which a person speaks
(especially boxing) equipment that protects an athlete's mouth
a part that goes over or into the mouth of a person
a spokesperson (as a lawyer)