Compositae vs genus Brickelia

Compositae and genus Brickelia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Compositae	Yes	No	No	No
genus Brickelia	Yes	No	No	No

Compositae (noun)	genus Brickelia (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	genus of herbs of southwestern America having usually creamy florets followed by one-seeded fruits in a prominent bristly sheath