Synonyms for Give the go-ahead:

• v.

  •accede (verb)
  • cooperate,
  • permit,
  • fold,
  • grant,
  • assent,
  • go along with,
  • allow,
  • cave in,
  • concur,
  • be game for,
  • yield,
  • okay,
  • roll over and play dead,
  • endorse,
  • give the green light,
  • subscribe,
  • throw in the towel,
  • acquiesce,
  • admit,
  • play ball,
  • concede,
  • comply,
  • enter into,
  • give the go-ahead,
  • let,
  • cry uncle.
  •accept (verb)
  • buy,
  • give the nod,
  • affirm,
  • lap up,
  • bear,
  • agree to,
  • assume,
  • rubber-stamp,
  • sign off on,
  • acknowledge,
  • cooperate with,
  • undertake,
  • go for,
  • thumbs up,
  • avow,
  • take one up on,
  • concur with,
  • give stamp of approval,
  • set store by,
  • sign,
  • adopt,
  • approve,
  • recognize.
  •agree (verb)
  • set,
  • make a deal,
  • engage,
  • give blessing,
  • clinch the deal,
  • give carte blanche,
  • check,
  • come to terms,
  • consent,
  • side with,
  • cut a deal,
  • bury the hatchet,
  • see eye to eye,
  • pass on,
  • settle,
  • be of the same mind,
  • give green light,
  • shake on,
  • buy into.
  •allow (verb)
  • live with,
  • support,
  • pass,
  • give permission,
  • warrant,
  • be big,
  • certify,
  • put up with,
  • suffer,
  • empower,
  • hold with,
  • stand,
  • brook,
  • tolerate,
  • free up,
  • commission,
  • take kindly to,
  • oblige,
  • favor,
  • give leave,
  • sanction,
  • indulge,
  • license,
  • release,
  • hear of,
  • give a blank check,
  • endure,
  • sit still for,
  • grant permission,
  • authorize.
  •ascertain the truth, authenticity of something (verb)
  • validate.
  •authorize (verb)
  • give the word,
  • give authority,
  • invest,
  • say the word,
  • entitle,
  • enable,
  • vest,
  • bless.
  •be in unison, assent with another (verb)
  • agree.
  •confirm (verb)
  • verify,
  • make good,
  • make sure,
  • vouch,
  • debunk,
  • attest,
  • uphold,
  • corroborate,
  • authenticate,
  • double-check,
  • back,
  • justify,
  • give high sign,
  • circumstantiate,
  • witness,
  • establish,
  • size up,
  • check out,
  • bear out,
  • underpin,
  • explain,
  • substantiate.
  •endorse (verb)
  • guarantee,
  • confirm,
  • vouch for,
  • second,
  • praise,
  • champion,
  • commend,
  • go to bat for,
  • boost,
  • stand up for,
  • ratify,
  • advocate,
  • underwrite,
  • stump for,
  • lend one's name to,
  • recommend,
  • countenance,
  • subscribe to,
  • give a boost to,
  • sustain,
  • push,
  • stand behind,
  • defend,
  • go with,
  • give one's word.
  •okay (verb)
  • consent to,
  • notarize,
  • give one's consent,
  • say yes to,
  • ok,
  • condone.
  •sanction (verb)
  • get behind.
  •validate (verb)
  • make stick,
  • make binding,
  • John Hancock,
  • set seal on,
  • legitimize,
  • legalize,
  • make legal,
  • constitute.

• Other synonyms:

  •agree
  • passes on,
  • passed on,
  • yeses,
  • coming to terms,
  • passing on,
  • yes.
  •authorize
  • give word,
  • gives authority.
  •okay
  • give consent,
  • consented to.

Antonyms for Give the go-ahead:

• v.

  • accede
    denounce, demur, protest, refuse, deny, condemn.
  • accept
    decline, disagree.
  • agree
    oppose, dispute, contend, dissent, contradict.
  • allow
    forbid, disallow, reject, prohibit, resist, withstand, disapprove.
  • confirm
    destroy, annul, invalidate, disprove, veto, void, cancel.
  • endorse
    censure, Unauthorize, repel.
  • sanction
    prevent.