Synonyms for Upholder:

• n.

  •advocate (noun)
  • speaker,
  • backer,
  • lawyer,
  • apostle,
  • attorney,
  • spokesperson,
  • defender,
  • counsel.
  •believer (noun)
  • prophet,
  • dogmatist,
  • religionist,
  • acceptor,
  • canonists,
  • religious person,
  • canonist,
  • devotee,
  • adherent,
  • orthodox,
  • dogmatists,
  • religionists,
  • disciple,
  • proselyte,
  • doctrinaires,
  • Acceptors,
  • zealot,
  • freak,
  • doctrinaire,
  • convert.
  •champion (noun)
  • challenger,
  • paladin,
  • sympathizer,
  • victor,
  • winner,
  • hero,
  • champ,
  • ally,
  • heroine,
  • number one,
  • guardian,
  • patron,
  • conqueror.
  •exponent (noun)
  • propagandist,
  • second,
  • demonstrator,
  • interpreter,
  • booster.
  •mainstay (noun)
  • standby,
  • brace,
  • linchpin,
  • righthand person,
  • sinew,
  • SINEWS,
  • bulwark,
  • sustainer,
  • sustainers,
  • maintainers,
  • right-hand person,
  • linchpins,
  • staff,
  • anchor,
  • crutch,
  • prop,
  • good right arm,
  • stay,
  • backbone,
  • strength,
  • buttress,
  • maintainer.
  •partisan (noun)
  • sycophant,
  • satellite,
  • cohort.
  •pillar (noun)
  • Worthies,
  • tower of strength,
  • Guider,
  • rock,
  • guiders,
  • light.
  •support/supporter (noun)
  • benefactor,
  • comforter.
  •supporter (noun)
  • suspender.

• Other synonyms:

  •adherent
  • follower.
  •champion
  • protector.
  •Other relevant words:
  • party,
  • Sectary,
  • Encourager,
  • subscriber,
  • bandeau,
  • reinforcer,
  • buff,
  • abetter,
  • admirer,
  • mast,
  • helper,
  • shoulder,
  • fulcrum,
  • guy,
  • lover,
  • reinforce,
  • Participator,
  • underwriter,
  • upholsterer,
  • confederate,
  • dependence,
  • cervix,
  • notary,
  • ratifier,
  • walking stick,
  • leader,
  • jockstrap,
  • guarantor,
  • aficionado,
  • abettor,
  • contributor,
  • accessory,
  • girdle,
  • carrier,
  • enthusiast,
  • Certifier,
  • stave,
  • Sider,
  • Confirmer,
  • Paranymph,
  • shroud,
  • spine,
  • stand-by,
  • alpenstock,
  • rest,
  • faithful,
  • secretary,
  • sponsor,
  • sectarian,
  • friend at court,
  • guard,
  • stick,
  • strengthener,
  • cosigner,
  • bracket,
  • participant,
  • foundation garment,
  • bracer,
  • friend,
  • spokesman,
  • jock,
  • standing rigging,
  • sprit,
  • bra,
  • brassiere,
  • approver,
  • back,
  • spokeswoman,
  • reinforcement,
  • mediator,
  • aid,
  • stiffener,
  • backing,
  • crook,
  • Favorer,
  • angel,
  • cane,
  • accomplice,
  • associate,
  • notary public,
  • arm,
  • bearer,
  • corset,
  • athletic supporter,
  • stalwart,
  • insurer,
  • loyalist,
  • trouper,
  • ace,
  • neck,
  • signatory,
  • rigging,
  • fan,
  • actor,
  • reliance,
  • sympathiser,
  • worthy,
  • cosignatory.

Antonyms for Upholder:

• n.

  • advocate
    opposition, enemy, opponent, assailant, protestor, antagonist.
  • believer
    disbeliever, non-believer, agnostic, atheist, adversary.
  • champion
    loser.
  • proponent
    detractor, foe.