Synonyms for Nailed down:

• adj.

  •assured (adjective)
  • definite,
  • fixed,
  • sealed,
  • unquestionable,
  • ensured,
  • irrefutable,
  • dependable,
  • undoubted,
  • clear-cut,
  • guaranteed,
  • sure,
  • set,
  • insured,
  • pronounced,
  • clinched,
  • confirmed,
  • indubitable.
  •authoritative (adjective)
  • definitive.
  •definitive (adjective)
  • flat out,
  • actual,
  • ultimate,
  • complete,
  • last,
  • finishing,
  • completing,
  • reliable,
  • unambiguous,
  • ending,
  • decisive,
  • closing,
  • specific,
  • real,
  • perfect,
  • exhaustive,
  • plain,
  • precise,
  • absolute,
  • categorical,
  • Terminating,
  • concluding,
  • express,
  • limiting,
  • determining,
  • conclusive,
  • downright,
  • settling.
  •exact (adjective)
  • distinct,
  • methodical,
  • clear,
  • faithful,
  • correct,
  • careful,
  • nice,
  • faultless,
  • rigorous,
  • bull's-eye,
  • explicit,
  • verbal,
  • sharp,
  • right,
  • literal,
  • true,
  • particular,
  • unequivocal,
  • verbatim,
  • orderly,
  • right on.
  •secure (adjective)
  • reassured,
  • shoo-in,
  • balanced,
  • cinch,
  • firm,
  • carefree,
  • tried and true,
  • able,
  • sound,
  • steady,
  • self-assured,
  • confident,
  • solid,
  • hopeful,
  • self-confident,
  • strong,
  • resolute,
  • sanguine.
  •stationary (adjective)
  • parked,
  • permanent,
  • motionless,
  • inert,
  • standing.

• v.

  •affirm (verb)
  • clinch,
  • maintain,
  • avouch,
  • pronounce,
  • cross heart,
  • confirm,
  • ratify,
  • profess,
  • vouch,
  • rubber-stamp,
  • repeat,
  • assert,
  • put on ice,
  • testify,
  • okay,
  • predicate,
  • state,
  • asseverate,
  • lock up,
  • swear up and down,
  • nail down,
  • witness,
  • certify,
  • insist,
  • declare,
  • attest,
  • have a lock on,
  • avow,
  • say so,
  • guarantee,
  • aver,
  • swear on bible,
  • swear.
  •assure (verb)
  • lock on.

• Other synonyms:

  •adj.
  • final,
  • identical,
  • immovable,
  • settled,
  • terminal,
  • unerring,
  • veracious,
  • well-founded,
  • Moored,
  • Racked,
  • on ice,
  • made certain,
  • nailed down,
  • on the money,
  • unanxious,
  • unequivocable,
  • in the bag,
  • assured,
  • at ease,
  • at rest,
  • beyond doubt,
  • exact,
  • immobile,
  • immotile,
  • incontrovertible,
  • on the button,
  • open-and-shut,
  • secure,
  • stationary,
  • Riveted,
  • Uncontestable,
  • Cinched,
  • bull's eye,
  • surefire,
  • cincher,
  • stockstill,
  • Undoubtful,
  • sewed up,
  • on target,
  • at a standstill,
  • bulls-eye,
  • clear cut,
  • dead on,
  • locked on,
  • no mistake,
  • no two ways about it,
  • on the numbers,
  • straight out.
  •n.
  • decided,
  • determined.
  •Other relevant words:
  • ensure,
  • insure,
  • lock,
  • make sure,
  • seal.

Antonyms for Nailed down:

• adj.

  • assured
    uncertain, Feared, doubted, doubtful.
  • definitive
    inconclusive, temporary, interim, unreliable, incomplete, inexact.
  • exact
    inaccurate, incorrect, imprecise, approximate, indefinite.
  • immobile
    movable, moving, unfixed, mobile.
  • incontrovertible
    questionable, variable, Controvertible, changeable.
  • secure
    undecided, insecure, unsure.
  • stationary
    restless, unsteady.

• v.

  • affirm
    negate, nullify, veto, deny.