calabash pipe vs tobacco pipe

calabash pipe and tobacco pipe both are nouns.

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

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

calabash pipe: a pipe for smoking; has a curved stem and a large bowl made from a calabash gourd
tobacco pipe: a tube with a small bowl at one end; used for smoking tobacco

Other hypernyms of calabash pipe include pipe.

calabash pipe (noun)	tobacco pipe (noun)
a pipe for smoking; has a curved stem and a large bowl made from a calabash gourd	a tube with a small bowl at one end; used for smoking tobacco