genus Cosmos vs Compositae

genus Cosmos and Compositae both are nouns.

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

genus Cosmos (noun)	Compositae (noun)
genus of tropical American plants cultivated for their colorful flowers	plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia