family Asteraceae vs genus Aster

family Asteraceae and genus Aster both are nouns.

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

family Asteraceae (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