nightshade vs poroporo

nightshade and poroporo both are nouns.

Word	Noun	Adjective	Verb	Adverb
nightshade	Yes	No	No	No
poroporo	Yes	No	No	No

As nouns, poroporo is a hyponym of nightshade; that is, poroporo is a word with a more specific, narrower meaning than nightshade:

nightshade: any of numerous shrubs or herbs or vines of the genus Solanum; most are poisonous though many bear edible fruit
poroporo: Australian annual sometimes cultivated for its racemes of purple flowers and edible yellow egg-shaped fruit

nightshade (noun)	poroporo (noun)
any of numerous shrubs or herbs or vines of the genus Solanum; most are poisonous though many bear edible fruit	Australian annual sometimes cultivated for its racemes of purple flowers and edible yellow egg-shaped fruit