genus Onopordon vs Compositae

genus Onopordon and Compositae both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Onopordon	Yes	No	No	No
Compositae	Yes	No	No	No

genus Onopordon (noun)	Compositae (noun)
a genus of Eurasian herbs of the family Compositae with prickly foliage and large purplish flowers	plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia