coalesce

1 to come together to form a single unit several small townships have coalesced into a single metropolis Synonyms associate, unite, combine, conjoin, conjugate, connect, couple, fuse, interfuse, join, link (up), marry, unifyRelated Words mate, yoke; ally, confederate, league; chain, compound, hitch, hook, splice; assemble, cluster, congregate, constellate, convene, gather, meet; recombine, reconnect, rejoin, reunify, reuniteNear Antonyms detach, disaffiliate, disconnect, disjoin, disjoint, dissociate, disunite, divide, divorce, fractionate, isolate, resolve, uncouple, unyoke; disband, disperse, scatterAntonyms break up, dissever, part, section, separate, sever, split, sunder, unlink

2 to form or enter into an association that furthers the interests of its members the historic preservation movement gained momentum when the two groups coalesced Synonyms associate, band (together), club, ally, cohere, confederate, conjoin, cooperate, federate, league, uniteRelated Words cabal, collaborate, gang up, hang together, team (up); incorporate, organize, unionize; affiliate; amalgamate, combine, conglomerate, consolidate, converge, group, join, merge; knot, link, tie, wedNear Antonyms detach, disengage, dissolve, disunite, divorce, part, segregate, separate, sever, split, sunder; alienate, estrange, fall outAntonyms break up, disband