family Compositae vs genus Ageratum

family Compositae and genus Ageratum both are nouns.

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

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