uncouple vs couple

uncouple is not a noun while couple is a noun.

Word	Noun	Adjective	Verb	Adverb
uncouple	No	No	Yes	No
couple	Yes	No	Yes	No

uncouple (noun)	couple (noun)
	a pair who associate with one another
	a pair of people who live together
	(physics) something joined by two equal and opposite forces that act along parallel lines
	two items of the same kind
	a small indefinite number

uncouple (verb)	couple (verb)
disconnect or separate	engage in sexual intercourse
	link together
	bring two objects, ideas, or people together
	form a pair or pairs