join vs joiner

join and joiner both are nouns.

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

join (noun)	joiner (noun)
a set containing all and only the members of two or more given sets	a woodworker whose work involves making things by joining pieces of wood
the shape or manner in which things come together and a connection is made	a person who likes to join groups

join (verb)	joiner (verb)
make contact or come together
cause to become joined or linked
become part of; become a member of a group or organization
come into the company of
be or become joined or united or linked