buckbean family vs dicot family

buckbean family and dicot family both are nouns.

Word	Noun	Adjective	Verb	Adverb
buckbean family	Yes	No	No	No
dicot family	Yes	No	No	No

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

buckbean family: a dicotyledonous family of marsh plants of order Gentianales
dicot family: family of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of buckbean family include magnoliopsid family.

buckbean family (noun)	dicot family (noun)
a dicotyledonous family of marsh plants of order Gentianales	family of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination