family Compositae vs genus Aster

family Compositae and genus Aster both are nouns.

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

family Compositae (noun)	genus Aster (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	large genus of herbs widely cultivated for their daisylike flowers