All give the go-ahead synonyms

verb give the go-ahead

• support — to bear or hold up (a load, mass, structure, part, etc.); serve as a foundation for.
• consenting — A consenting adult is a person who is considered to be old enough to make their own decisions about who they have sex with.
• notarize — to certify (a document, contract, etc.) or cause to become certified through a notary public.
• legalize — to make legal; authorize.
• legitimize — to make legitimate.
• acquiesce — If you acquiesce in something, you agree to do what someone wants or to accept what they do.
• affirm — If you affirm that something is true or that something exists, you state firmly and publicly that it is true or exists.
• acknowledge — If you acknowledge a fact or a situation, you accept or admit that it is true or that it exists.
• assume — If you assume that something is true, you imagine that it is true, sometimes wrongly.
• recognize — to identify as something or someone previously seen, known, etc.: He had changed so much that one could scarcely recognize him.
• adopt — If you adopt a new attitude, plan, or way of behaving, you begin to have it.
• sign — a token; indication.
• buy — If you buy something, you obtain it by paying money for it.
• undertake — to take upon oneself, as a task, performance, etc.; attempt: She undertook the job of answering all the mail.
• approve — If you approve of an action, event, or suggestion, you like it or are pleased about it.
• set — to put (something or someone) in a particular place: to set a vase on a table.
• settle — to appoint, fix, or resolve definitely and conclusively; agree upon (as time, price, or conditions).
• authorize — If someone in a position of authority authorizes something, they give their official permission for it to happen.
• oblige — to require or constrain, as by law, command, conscience, or force of necessity.
• support — to bear or hold up (a load, mass, structure, part, etc.); serve as a foundation for.
• tolerate — to allow the existence, presence, practice, or act of without prohibition or hindrance; permit.
• favor — something done or granted out of goodwill, rather than from justice or for remuneration; a kind act: to ask a favor.
• pass — to move past; go by: to pass another car on the road.
• release — to lease again.
• uphold — to support or defend, as against opposition or criticism: He fought the duel to uphold his family's honor.
• verify — to prove the truth of, as by evidence or testimony; confirm; substantiate: Events verified his prediction.
• substantiate — to establish by proof or competent evidence: to substantiate a charge.
• back — If you move back, you move in the opposite direction to the one in which you are facing or in which you were moving before.
• corroborate — To corroborate something that has been said or reported means to provide evidence or information that supports it.
• ratify — to confirm by expressing consent, approval, or formal sanction: to ratify a constitutional amendment.
• defend — If you defend someone or something, you take action in order to protect them.
• advocate — If you advocate a particular action or plan, you recommend it publicly.
• commend — If you commend someone or something, you praise them formally.
• confirm — If something confirms what you believe, suspect, or fear, it shows that it is definitely true.
• praise — the act of expressing approval or admiration; commendation; laudation.
• recommend — to present as worthy of confidence, acceptance, use, etc.; commend; mention favorably: to recommend an applicant for a job; to recommend a book.
• ok — all right; proceeding normally; satisfactory or under control: Things are OK at the moment.
• condone — If someone condones behaviour that is morally wrong, they accept it and allow it to happen.
• constitute — If something constitutes a particular thing, it can be regarded as being that thing.
• okay — to put one's endorsement on or indicate one's approval of (a request, piece of copy, bank check, etc.); authorize; initial: Would you OK my application?
• grant — to bestow or confer, especially by a formal act: to grant a charter.
• fold — to confine (sheep or other domestic animals) in a fold.
• assent — If someone gives their assent to something that has been suggested, they formally agree to it.
• accept — If you accept something that you have been offered, you say yes to it or agree to take it.
• cooperate — If you cooperate with someone, you work with them or help them for a particular purpose. You can also say that two people cooperate.
• subscribe — to pledge, as by signing an agreement, to give or pay (a sum of money) as a contribution, gift, or investment: He subscribed $6,000 for the new church.
• admit — If you admit that something bad, unpleasant, or embarrassing is true, you agree, often unwillingly, that it is true.
• concede — If you concede something, you admit, often unwillingly, that it is true or correct.
• let — Archaic. to hinder, prevent, or obstruct.
• yield — to give forth or produce by a natural process or in return for cultivation: This farm yields enough fruit to meet all our needs.