family Compositae vs genus Ammobium

family Compositae and genus Ammobium both are nouns.

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

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