buffalo nut vs parasitic plant

buffalo nut and parasitic plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
buffalo nut	Yes	No	No	No
parasitic plant	Yes	No	No	No

As nouns, parasitic plant is a hypernym of buffalo nut; that is, parasitic plant is a word with a broader meaning than buffalo nut:

buffalo nut: shrub of southeastern United States parasitic on roots of hemlocks having sparse spikes of greenish flowers and pulpy drupes
parasitic plant: plant living on another plant and obtaining organic nutriment from it

buffalo nut (noun)	parasitic plant (noun)
shrub of southeastern United States parasitic on roots of hemlocks having sparse spikes of greenish flowers and pulpy drupes	plant living on another plant and obtaining organic nutriment from it
oily drupaceous fruit of rabbitwood