aster family vs genus Tithonia

aster family and genus Tithonia both are nouns.

Word	Noun	Adjective	Verb	Adverb
aster family	Yes	No	No	No
genus Tithonia	Yes	No	No	No

aster family (noun)	genus Tithonia (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	genus of robust herbs of Mexico and Central America: Mexican sunflower