controversial vs moot

controversial is not a noun while moot is a noun.

Word	Noun	Adjective	Verb	Adverb
controversial	No	Yes	No	No
moot	Yes	Yes	Yes	No

controversial (noun)	moot (noun)
	a hypothetical case that law students argue as an exercise

controversial (adjective)	moot (adjective)
marked by or capable of arousing controversy	open to argument or debate
	of no legal significance (as having been previously decided)

controversial (verb)	moot (verb)
	think about carefully; weigh