unsaddle vs saddle

unsaddle is not a noun while saddle is a noun.

Word	Noun	Adjective	Verb	Adverb
unsaddle	No	No	Yes	No
saddle	Yes	No	Yes	No

unsaddle (noun)	saddle (noun)
	posterior part of the back of a domestic fowl
	a seat for the rider of a horse or other animal
	a seat for the rider of a bicycle
	a piece of leather across the instep of a shoe
	cut of meat (especially mutton or lamb) consisting of part of the backbone and both loins
	a pass or ridge that slopes gently between two peaks (is shaped like a saddle)

unsaddle (verb)	saddle (verb)
remove the saddle from	impose a task upon, assign a responsibility to
	put a saddle on
	load or burden; encumber