tall-growing vs flora

tall-growing is not a noun while flora is a noun.

Word	Noun	Adjective	Verb	Adverb
tall-growing	No	Yes	No	No
flora	Yes	No	No	No

tall-growing (noun)	flora (noun)
	(botany) a living organism lacking the power of locomotion
	all the plant life in a particular region or period

tall-growing (adjective)	flora (adjective)
(of plants) having tall spindly stems