unknot vs knot

unknot is not a noun while knot is a noun.

Word	Noun	Adjective	Verb	Adverb
unknot	No	No	Yes	No
knot	Yes	No	Yes	No

unknot (noun)	knot (noun)
	a sandpiper that breeds in the Arctic and winters in the Southern Hemisphere
	any of various fastenings formed by looping and tying a rope (or cord) upon itself or to another rope or to another object
	soft lump or unevenness in a yarn; either an imperfection or created by design
	a tight cluster of people or things
	something twisted and tight and swollen
	a hard cross-grained round piece of wood in a board where a branch emerged
	(of ships and wind) a unit of speed equal to one nautical mile per hour or about 1.15 statute miles per hour

unknot (verb)	knot (verb)
become or cause to become undone by separating the fibers or threads of	tie or fasten into a knot
	tangle or complicate
	make into knots; make knots out of