Buxus vs dicot genus

Buxus and dicot genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Buxus	Yes	No	No	No
dicot genus	Yes	No	No	No

As nouns, dicot genus is a hypernym of Buxus; that is, dicot genus is a word with a broader meaning than Buxus:

Buxus: type genus of the Buxaceae
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Buxus include magnoliopsid genus.

Buxus (noun)	dicot genus (noun)
type genus of the Buxaceae	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination