Synonyms for Make fast:

• v.

  •attach (verb)
  • fix,
  • add,
  • append,
  • hitch up,
  • bind,
  • hook on,
  • connect,
  • tie,
  • stick,
  • hook up,
  • couple,
  • tag on,
  • adhere,
  • annex,
  • affix,
  • prefix,
  • unite,
  • latch onto,
  • link,
  • slap on,
  • hitch on,
  • rivet.
  •fasten with lock (verb)
  • latch.
  •secure (verb)
  • padlock.
  •set (verb)
  • turn.
  •tie (verb)
  • wed,
  • band,
  • marry,
  • make a bow,
  • do up,
  • make a hitch,
  • make a knot,
  • gird.

• Other synonyms:

  •attach
  • Prefixing,
  • subjoin,
  • Prefixed,
  • hitched up,
  • slapped on,
  • hooked on,
  • rivets,
  • Riveted,
  • made fast,
  • hooked up,
  • latched onto,
  • peg.
  •peg
  • Pegged.
  •tie
  • roping,
  • Trussing,
  • Roped,
  • trussed,
  • tied.
  •Other relevant words:
  • hog-tie,
  • hamper,
  • straitjacket,
  • bracket,
  • hobble,
  • weld,
  • cramp,
  • handcuff,
  • manacle,
  • make sure,
  • pin,
  • batten,
  • join,
  • trim,
  • knit,
  • knot,
  • clip,
  • screw up,
  • shackle,
  • restrain,
  • rope,
  • trammel,
  • bridle,
  • spike,
  • tighten,
  • pin down,
  • truss,
  • belay,
  • annexe,
  • leash,
  • set,
  • fuse,
  • fetter,
  • graft,
  • splice.

Antonyms for Make fast:

• v.

  • attach
    unfasten, separate, take away, remove, untie, disconnect, sever, loose, disjoin, divorce, forget, divide, let go, Unfix, detach, lose, loosen, disunite.
  • clamp
    unclamp, unlock, unbuckle, open.
  • clinch
    release, push away, liberate, give.
  • hitch
    unhitch, unchain.
  • latch
    Unlatch.
  • moor
    push off.
  • secure
    harm, endanger, give up, hurt, forfeit, injure, unsettle, free.
  • set
    dissuade, gather, discourage, disorganize, finish, depart, ascend, refuse, disorder, destroy, halt, hinder, liquefy, change, end, soften, neglect, displace, confuse, take out, ignore, leave, take, go up, move, rise.
  • subjoin
    subtract.
  • tie
    succeed, compliment, praise, surpass, fail, unlace, go ahead, fall behind.