THESAURUS
fall out
agree to disagree, attend, become of, befall, betide, bicker, break, break with, caterwaul, chance, come about, come of, come off, come out, develop, diverge, divide, end, ensue, eventuate, fare, follow, go, have a falling-out, issue, occur, pan out, part company, prove, prove to be, result, row, scrap, separate, spat, split, squabble, terminate, tiff, transpire, turn out, unfold, work out, wrangle
ROGET THESAURUS
fall out
Discord
VB
be discordant, disagree, come amiss, clash, jar, jostle, pull different ways, conflict, have no measures with, misunderstand one another, live like cat and dog, differ, dissent, have a bone to pick, have a crow to pluck with,
fall out, quarrel, dispute, litigate, controvert, squabble, wrangle, jangle, brangle, bicker, nag, spar, have words, with, fall foul of, split, break with, break squares with, part company with, declare war, try conclusions, join issue, put in issue, pick a quarrel, fasten a quarrel on, sow dissension, stir up dissension, embroil, entangle, disunite, widen the breach, set at odds, set together by the ears, set against, pit against, get into hot water, fish in troubled waters, brawl, kick up a row, kick up a dust, turn the house out of window, be discordant, jar.
Eventuality
VB
happen, occur, take place, take effect, come, become of, come off, comeabout, come round, come into existence, come forth, come to pass, come on, pass, present itself, fall,
fall out, turn out, run, be on foot, fall in, befall, betide, bechance, prove, eventuate, draw on, turn up, crop up, spring up, pop up, arise, show up, show its face, appear, come forth, cast up, supervene, survene, issue, arrive, ensue, arise, start, hold, take its course, pass off, meet with, experience, enjoy, encounter, undergo, suffer, pass through, go through, be subjected to, be exposed to, fall to the lot of, be one's chance, be one's fortune, be one's lot, find, endure.
Enmity
VB
be inimical, keep at arm's length, hold at arm's length, be at loggerheads, bear malice,
fall out, take umbrage, harden the heart, alienate, estrange, (indifference).