noun
person supporting an idea or cause publicly
Synonyms: apostle, attorney, backer, campaigner, champion, counsel, defender, exponent, expounder, lawyer, pleader, promoter, proponent, proposer, speaker, spokesperson, supporter, upholder
Antonyms: antagonist, assailant, enemy, opposition, protestor
verb
support idea or cause publicly
Synonyms: advance, advise, argue for, back, be in corner, bless, bolster, boost, brace up, build up, campaign for, champion, countenance, defend, encourage, favor, further, get on bandwagon, give a leg up, give a lift, go for, go to bat for, go with, hold with, justify, plead for, plug, plump for, press for, promote, propose, push, recommend, ride shotgun for, root for, run interference for, say so, side, speak for, spread around, stump for, support, tout, uphold, urge, vindicate
Antonyms: assail, attack, criticize, impugn, oppose, protest