compass flower vs family Compositae

compass flower and family Compositae both are nouns.

Word	Noun	Adjective	Verb	Adverb
compass flower	Yes	No	No	No
family Compositae	Yes	No	No	No

compass flower (noun)	family Compositae (noun)
any of several plants having leaves so arranged on the axis as to indicate the cardinal points of the compass	plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia