family Compositae vs genus Onopordum

family Compositae and genus Onopordum both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Compositae	Yes	No	No	No
genus Onopordum	Yes	No	No	No

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