saddle vs bicycle seat

saddle and bicycle seat both are nouns.

Word	Noun	Adjective	Verb	Adverb
saddle	Yes	No	Yes	No
bicycle seat	Yes	No	No	No

As nouns, saddle and bicycle seat are synonyms defined as:

saddle (noun)	bicycle seat (noun)
posterior part of the back of a domestic fowl	a seat for the rider of a bicycle
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)	bicycle seat (verb)
impose a task upon, assign a responsibility to
put a saddle on
load or burden; encumber