family Compositae vs genus Zinnia

family Compositae and genus Zinnia both are nouns.

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

family Compositae (noun)	genus Zinnia (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	genus of annual or perennial plants of tropical America having solitary heads of brightly colored flowers