join vs complect

join is a noun but complect is not a noun.

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

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

Other hyponyms of join include syndicate, articulate, interconnect, interlink.

join (noun)	complect (noun)
a set containing all and only the members of two or more given sets
the shape or manner in which things come together and a connection is made

join (verb)	complect (verb)
make contact or come together	be interwoven or interconnected
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