Mandevilla vs dicot genus

Mandevilla and dicot genus both are nouns.

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

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

Mandevilla: genus of tropical South American tuberous perennial woody vines with large racemose flowers and milky sap
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Mandevilla include magnoliopsid genus.

Mandevilla (noun)	dicot genus (noun)
genus of tropical South American tuberous perennial woody vines with large racemose flowers and milky sap	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination