Synonyms for Join:

n.

hem, go over to, neighbor, skirt, flank, admit, rim, co-opt, From, DUES, entrance, inaugurate, belong to, admission, parallel, fringe, accept, bound. fix, pin, verge, near. land, compound, concrete, break into, arrive, stand in, substitute, meld, start, coalesce, fill in, conjugate. DO, get in on, take part (in something), muster in, involve, engage in, enter into, sit in on. knit, get in with, join in, pull together, partner, mobilize. node, seam, vertex, ridge. group (noun)
sum, union.
join (noun)
union, juncture, bring together, link up, articulation, fall in, link, conjoin, connect, sum, get together, unite, junction.
shape (noun)
articulation, juncture, junction.

v.

affiliate with organization (verb)
follow, enroll, align, enter, team up with, enlist, sign up, consort, take up with, sign on, side with.
attach (verb)
couple, merge, bind, hitch, marry, juxtapose, relate, bond, cling, fasten, adhere, splice, attach, affix, wed, connect, annex, abut, stick.
contact (verb)
contact, meet, touch, butt, reach out, border, adjoin.
enroll (verb)
enlist, register, subscribe, enroll.
fasten (verb)
grapple.
join (verb)
affiliate, amalgamate, consolidate, ally.
meet (verb)
encounter, receive, welcome, bump into, assemble, gather, greet, run into.
participate (verb)
participate, co-operate, share, partake, enter.
social (verb)
fall in, get together.
socialize (verb)
host, socialize, hob-nob, converse, talk, befriend, attend.
touch; border on (verb)
hem, butt, abut, fringe, skirt, bound, neighbor, adjoin, rim, meet, parallel.
unite (verb)
couple, annex, interlace, splice, fasten, leash, entwine, conjoin, intermix, attach, fuse, clamp, lock, bracket, conjugate, accompany, juxtapose, touch, blend, knit, clasp, cement, grapple, connect, marry, link, concrete, adhere, affix, mix, compound, weld, append, assemble, clip, span, wed, coalesce.

Other synonyms:

surround, entwine, conjugate, join in, engage in, bracket, sit in on, get in on, rejoin, overlap, team up with, enter into, mix, interlock. interlace, compound, flank, append, align, pin, meld, intersect, knit, clip, neighbor, interface. clamp, vertex, stand in, seam, involve, fix. ridge, fill in. node. arrive, substitute, start. DO. append
subjoin.
blend
coalesce.
combine
interface, team up with, co-operate, conjugate, conjoin.
come near
verge.
consort
fraternize.
enroll
enroll.
enter
sign up.
fuse
weld.
get together
get together.
link
link.
marry
wed.
neighbor
neighbor.
put together
assemble.
socialize
mix.
tie
splice.
unify
pull together.

Usage examples for join

  1. I pray you, again, give it up and join in the Lord's work." – Black Man's Burden by Dallas McCord Reynolds
  2. Come; we will go and join him. – Astounding Stories of Super-Science, March 1930 by Various
  3. You had better join us, and take care of me! – Sisters Three by Mrs. George de Horne Vaizey