Knightia vs dicot genus

Knightia and dicot genus both are nouns.

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

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

Knightia: small genus of trees or shrubs of New Zealand and New Caledonia
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Knightia include magnoliopsid genus.

Knightia (noun)	dicot genus (noun)
small genus of trees or shrubs of New Zealand and New Caledonia	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination