family Compositae vs genus Chamaemelum

family Compositae and genus Chamaemelum both are nouns.

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

family Compositae (noun)	genus Chamaemelum (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	small genus of plants sometimes included in genus Anthemis: chamomile