set vs join

set and join both are nouns.

Word	Noun	Adjective	Verb	Adverb
set	Yes	Yes	Yes	No
join	Yes	No	Yes	No

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

set: a group of things of the same kind that belong together and are so used
join: a set containing all and only the members of two or more given sets

set (noun)	join (noun)
several exercises intended to be done in series	a set containing all and only the members of two or more given sets
the act of putting something in position	the shape or manner in which things come together and a connection is made
representation consisting of the scenery and other properties used to identify the location of a dramatic production
any electronic equipment that receives or transmits radio or tv signals
(psychology) being temporarily ready to respond in a particular way
a relatively permanent inclination to react in a particular way
the descent of a heavenly body below the horizon
a group of things of the same kind that belong together and are so used
an unofficial association of people or groups
(mathematics) an abstract collection of numbers or symbols
the process of becoming hard or solid by cooling or drying or crystallization
a unit of play in tennis or squash

set (adjective)	join (adjective)
set down according to a plan
being below the horizon
converted to solid form (as concrete)
fixed and unmoving
(usually followed by `to' or `for') on the point of or strongly disposed
situated in a particular spot or position
determined or decided upon as by an authority

set (verb)	join (verb)
arrange attractively	make contact or come together
produce fruit	cause to become joined or linked
alter or regulate so as to achieve accuracy or conform to a standard	become part of; become a member of a group or organization
put into a certain state; cause to be in a certain state	come into the company of
set to a certain position or cause to operate correctly	be or become joined or united or linked
equip with sails or masts
become gelatinous
make ready or suitable or equip in advance for a particular purpose or for some use, event, etc
get ready for a particular purpose or event
fix conclusively or authoritatively
estimate
decide upon or fix definitely
establish as the highest level or best performance
urge to attack someone
put into a certain place or abstract location
fix in a border
give a fine, sharp edge to a knife or razor
insert (a nail or screw below the surface, as into a countersink)
put or set (seeds, seedlings, or plants) into the ground
put into a position that will restore a normal state
adapt for performance in a different way
locate
set in type
apply or start
disappear beyond the horizon