Dutchman's-pipe vs birthwort

Dutchman's-pipe and birthwort both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dutchman's-pipe	Yes	No	No	No
birthwort	Yes	No	No	No

As nouns, birthwort is a hypernym of Dutchman's-pipe; that is, birthwort is a word with a broader meaning than Dutchman's-pipe:

Dutchman's-pipe: hardy deciduous vine having large leaves and flowers with the calyx tube curved like the bowl of a pipe
birthwort: creeping plant having curving flowers thought to resemble fetuses; native to Europe; naturalized Great Britain and eastern North America

Other hypernyms of Dutchman's-pipe include Aristolochia clematitis.

Dutchman's-pipe (noun)	birthwort (noun)
hardy deciduous vine having large leaves and flowers with the calyx tube curved like the bowl of a pipe	creeping plant having curving flowers thought to resemble fetuses; native to Europe; naturalized Great Britain and eastern North America