briar pipe vs tobacco pipe

briar pipe and tobacco pipe both are nouns.

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

As nouns, tobacco pipe is a hypernym of briar pipe; that is, tobacco pipe is a word with a broader meaning than briar pipe:

Other hypernyms of briar pipe include pipe.

briar pipe (noun)	tobacco pipe (noun)
a pipe made from the root (briarroot) of the tree heath	a tube with a small bowl at one end; used for smoking tobacco