Chionanthus vs dicot genus

Chionanthus and dicot genus both are nouns.

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

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

Chionanthus: deciduous trees or shrubs: fringe tree
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Chionanthus include magnoliopsid genus.

Chionanthus (noun)	dicot genus (noun)
deciduous trees or shrubs: fringe tree	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination