side vs fall

side and fall both are nouns.

Word	Noun	Adjective	Verb	Adverb
side	Yes	Yes	Yes	No
fall	Yes	No	Yes	No

As nouns, fall is a hyponym of side; that is, fall is a word with a more specific, narrower meaning than side:

side (noun)	fall (noun)
an extended outer surface of an object	a sudden drop from an upright position
either the left or right half of a body	the act of surrendering (usually under agreed conditions)
an aspect of something (as contrasted with some other implied aspect)	a lapse into sin; a loss of innocence or of chastity
an opinion that is held in opposition to another in an argument or dispute	a sudden sharp decrease in some quantity
(sports) the spin given to a ball by striking it on one side or releasing it with a sharp twist	a free and rapid descent by the force of gravity
a lengthwise dressed half of an animal's carcass used for food	a sudden decline in strength or number or importance
one of two or more contesting groups	when a wrestler's shoulders are forced to the mat
a family line of descent	a movement downward
a surface forming part of the outside of an object	a downward slope or bend
a line segment forming part of the perimeter of a plane figure	the season when the leaves fall from the trees
a place within a region identified relative to a center or reference location	the time of day immediately following sunset
an elevated geological formation

side (adjective)	fall (adjective)
located on a side

side (verb)	fall (verb)
take sides for or against	occur at a specified time or place
	decrease in size, extent, or range
	pass suddenly and passively into a state of body or mind
	be born, used chiefly of lambs
	come out; issue
	assume a disappointed or sad expression
	begin vigorously
	come as if by falling
	be cast down
	go as if by falling
	fall or flow in a certain way
	move downward and lower, but not necessarily all the way
	move in a specified direction
	descend in free fall under the influence of gravity
	slope downward
	drop oneself to a lower or less erect position
	lose an upright position suddenly
	to be given by assignment or distribution
	be captured
	fall to somebody by assignment or lot; passed
	come into the possession of
	to be given by right or inheritance
	be inherited by
	lose office or power
	yield to temptation or sin
	suffer defeat, failure, or ruin
	lose one's chastity
	die, as in battle or in a hunt
	be due
	come under, be classified or included
	touch or seem as if touching visually or audibly
	fall from clouds