Fagopyrum vs dicot genus

Fagopyrum and dicot genus both are nouns.

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

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

Fagopyrum: buckwheat; in some classifications included in the genus Polygonum
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Fagopyrum include magnoliopsid genus.

Fagopyrum (noun)	dicot genus (noun)
buckwheat; in some classifications included in the genus Polygonum	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination