Synonyms to lock horns

antagonize, aggravate, alienate, battle, be antipathetic, be inimical, beat against, beat up against, breast the wave, buck, buffet, buffet the waves, clash, close with, collide, combat, compete with, conflict, conflict with, confute, contend against, contest, contradict, contrapose, contravene, counter, counteract, counterattack, counterpose, countervail, counterwork, cross, embitter, envenom, estrange, exacerbate, fight, fight against, go against, go counter to, grapple with, heat up, infuriate, interfere with, join battle with, labor against, madden, meet head-on, militate against, offer resistance, oppose, oppugn, provoke, reluct, reluctate, resist, rival, run against, run counter to, set against, set at odds, stem the tide, strive against, struggle against, swim upstream, take on, vie with, work against, argue, affirm, agitate, allege, altercate, analyze, announce, annunciate, approve, argufy, assert, assever, asseverate, attest, aver, avouch, avow, balk, bandy words, be construed as, be indicative of, be significant of, be symptomatic of, bespeak, betoken, bicker, breathe, canvass, cavi