surface vs side

surface and side both are nouns.

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

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

surface: the outer boundary of an artifact or a material layer constituting or resembling such a boundary
side: an extended outer surface of an object

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

surface: the extended two-dimensional outer boundary of a three-dimensional object
side: a surface forming part of the outside of an object

surface (noun)	side (noun)
the outer boundary of an artifact or a material layer constituting or resembling such a boundary	an extended outer surface of an object
a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight	either the left or right half of a body
a superficial aspect as opposed to the real nature of something	an aspect of something (as contrasted with some other implied aspect)
information that has become public	an opinion that is held in opposition to another in an argument or dispute
the extended two-dimensional outer boundary of a three-dimensional object	(sports) the spin given to a ball by striking it on one side or releasing it with a sharp twist
the outermost level of the land or sea	a lengthwise dressed half of an animal's carcass used for food
	one of two or more contesting groups
	a family line of descent
	a surface forming part of the outside of an object
	a line segment forming part of the perimeter of a plane figure
	a place within a region identified relative to a center or reference location
	an elevated geological formation

surface (adjective)	side (adjective)
on the surface	located on a side

surface (verb)	side (verb)
appear or become visible; make a showing	take sides for or against
put a coat on; cover the surface of; furnish with a surface
come to the surface