1.  differ(v = verb.stative) - be different; "These two tests differ in only one respect"
Antonym: equal
Derived forms noun difference₁, adjective different₃, adjective different₄, adjective different₁, adjective different₂, adjective different₅
Sample sentences: Something ----s; Something is ----ing PP

2.  differ(v = verb.communication) disagree, dissent, take issue - be of different opinions; "I beg to differ!"; "She disagrees with her husband on many questions"
Derived form noun difference₃
Sample sentences: Something ----s; Somebody ----s

differ, v.intr.
1 (often foll. by from) be unlike or distinguishable.
2 (often foll. by with) disagree; be at variance (with a person).

Etymology:
ME f. OF differer f. L differre, differ, DEFER(1), (as DIS-, ferre bear, tend)

VB  be different, differ, vary, ablude, mismatch, contrast, divaricate, differ toto coelo, differ longo intervallo, vary, modify, discriminate.

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.

beg to differ