cubeb vine vs true pepper

cubeb vine and true pepper both are nouns.

Word	Noun	Adjective	Verb	Adverb
cubeb vine	Yes	No	No	No
true pepper	Yes	No	No	No

As nouns, true pepper is a hypernym of cubeb vine; that is, true pepper is a word with a broader meaning than cubeb vine:

cubeb vine: tropical southeast Asian shrubby vine bearing spicy berrylike fruits
true pepper: any of various shrubby vines of the genus Piper

Other hypernyms of cubeb vine include pepper vine.

cubeb vine (noun)	true pepper (noun)
tropical southeast Asian shrubby vine bearing spicy berrylike fruits	any of various shrubby vines of the genus Piper