saddle vs unsaddle

saddle is a noun but unsaddle is not a noun.

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

saddle (noun)	unsaddle (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)

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