coupling vs couple

coupling and couple both are nouns.

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

coupling (noun)	couple (noun)
the act of pairing a male and female for reproductive purposes	a pair who associate with one another
a mechanical device that serves to connect the ends of adjacent objects	a pair of people who live together
a connection (like a clamp or vise) between two things so they move 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

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