Definition for Back up:

• to move in a reverse direction; used of vehicles or animals.

Synonyms for Back up:

• n.

  •
  • withdraw,
  • retrogress,
  • retreat,
  • fall back.
  •
  • help,
  • promote,
  • get behind.
  •
  • show,
  • certify,
  • validate,
  • vouch for,
  • prove.
  •
  • carry.
  •
  • back away,
  • backtrack.
  •back up (noun)
  • back off,
  • foul,
  • choke off,
  • choke,
  • clog,
  • clog up,
  • congest,
  • support,
  • back,
  • back down.

• v.

  •change (verb)
  • back.
  •intensify (verb)
  • strengthen.
  •move backward (verb)
  • withdraw,
  • retreat,
  • fall back,
  • abandon.
  •social (verb)
  • support.
  •support (verb)
  • champion,
  • confirm,
  • advance,
  • promote,
  • help,
  • back,
  • pull for,
  • encourage,
  • stand behind.

• Other synonyms:

  •
  • encourage.
  •
  • plunge,
  • uphold,
  • cooperate.
  •
  • run.
  •
  • shift.
  •
  • reverse.
  •
  • carry.
  •defend
  • speak for,
  • stick up for.
  •substitute
  • pinch-hit,
  • substitute,
  • double for,
  • stand in for,
  • act for.
  •Other relevant words:
  • clinch,
  • climb,
  • budge,
  • clot,
  • endorse,
  • certify,
  • retire,
  • side with,
  • recrudesce,
  • mainstay,
  • replace,
  • back out,
  • whirl,
  • substantiate,
  • go round,
  • recoil,
  • hold,
  • rise,
  • establish,
  • commission,
  • ascend,
  • elect,
  • demonstrate,
  • hold up,
  • clench,
  • go into reverse,
  • run interference for,
  • circle,
  • Upbear,
  • stay,
  • countermarch,
  • buoy up,
  • wane,
  • abate,
  • countenance,
  • crutch,
  • represent,
  • keep afloat,
  • affirm,
  • change place,
  • descend,
  • reverse,
  • aid and abet,
  • double for,
  • bolster up,
  • speak for,
  • shy away,
  • stiffen,
  • validate,
  • retrogress,
  • go to bat for,
  • back,
  • promote,
  • keep in countenance,
  • come after,
  • help,
  • confirm,
  • go back,
  • ensure,
  • stream,
  • front for,
  • promise,
  • substitute,
  • subside,
  • encourage,
  • accredit,
  • pull for,
  • sustain,
  • upkeep,
  • stir,
  • shore up,
  • recede,
  • carry,
  • abandon,
  • second,
  • probate,
  • withdraw,
  • fall behind,
  • approve,
  • deputize,
  • move over,
  • appear for,
  • trail behind,
  • further,
  • spin,
  • supplant,
  • back away,
  • act for,
  • sink,
  • run,
  • subscribe,
  • retreat,
  • be answerable for,
  • revert,
  • strengthen,
  • stand in for,
  • understudy,
  • uphold,
  • go backwards,
  • get behind,
  • return,
  • verify,
  • fall back,
  • move back,
  • underwrite,
  • shoulder,
  • Underset,
  • shore,
  • pillow,
  • ebb,
  • underpin,
  • change,
  • rotate,
  • consolidate,
  • progress,
  • bear out,
  • nominate,
  • insure,
  • buttress,
  • underlie,
  • Underbrace,
  • champion,
  • assist,
  • indorse,
  • shift,
  • subsidize,
  • prove,
  • turn tail,
  • cushion,
  • bear,
  • prop,
  • soar,
  • lend support,
  • sanction,
  • stick by,
  • gyrate,
  • pinch-hit,
  • stand behind,
  • travel,
  • show,
  • trail,
  • brace,
  • bear witness to,
  • vouch,
  • cooperate,
  • double back,
  • get over,
  • abet,
  • advance,
  • answer for,
  • backtrack,
  • steady,
  • testify to,
  • move,
  • document,
  • recognize,
  • authorize,
  • substitute for,
  • undergird,
  • bolster,
  • attest,
  • backpedal,
  • reinforce,
  • vote,
  • guarantee,
  • vouch for,
  • corroborate,
  • haul up,
  • fortify,
  • backwater,
  • mount,
  • lag behind,
  • keep up,
  • take sides with,
  • warrant,
  • follow,
  • subvention,
  • assure,
  • ratify,
  • authenticate,
  • cradle,
  • stick up for,
  • plunge,
  • flow,
  • maintain,
  • bear up,
  • circumstantiate,
  • regress.

Antonyms for Back up:

• Other antonyms:

  • n. t.
    advance, compulsion, constraint, continue, defend, forge, necessity, obligation, pursue, rejection, restraint, unclog.

• v.

  • move backward
    pursue, forge, defend, continue.
  • Other antonyms:
    unclog.