Tabernaemontana vs dicot genus

Tabernaemontana and dicot genus both are nouns.

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

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

Tabernaemontana: evergreen tropical trees and shrubs with milky sap
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Tabernaemontana include magnoliopsid genus.

Tabernaemontana (noun)	dicot genus (noun)
evergreen tropical trees and shrubs with milky sap	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination