Exacum affine vs houseplant

Exacum affine and houseplant both are nouns.

Word	Noun	Adjective	Verb	Adverb
Exacum affine	Yes	No	No	No
houseplant	Yes	No	No	No

As nouns, houseplant is a hypernym of Exacum affine; that is, houseplant is a word with a broader meaning than Exacum affine:

Exacum affine: perennial cultivated especially as a houseplant for its fragrant bluish to dark lavender flowers
houseplant: any of a variety of plants grown indoors for decorative purposes

Exacum affine (noun)	houseplant (noun)
perennial cultivated especially as a houseplant for its fragrant bluish to dark lavender flowers	any of a variety of plants grown indoors for decorative purposes