Searching for synonyms for ensure? Here’s some similar words from our thesaurus you can use instead.

• “This nest egg will ensure a nice retirement for us“
• “Preparation will guarantee success!“

Synonyms

• guarantee a written assurance that some product or service will be provided or will meet certain specifications ; an unconditional commitment that something will happen or that something is true; a collateral agreement to answer for the debt of another in case that person defaults ; give surety or assume responsibility; make certain of; promise to do or accomplish; stand behind and guarantee the quality, accuracy, or condition of
• insure be careful or certain to do something; make certain of; protect by insurance; take out insurance for
• assure make certain of; inform positively and with certainty and confidence; assure somebody of the truth of something with the intention of giving the listener confidence; be careful or certain to do something; cause to feel sure; make a promise or commitment
• secure free from fear or doubt; free from danger or risk; not likely to fail or give way; immune to attack; financially safe; get by special effort; cause to be firmly attached; assure payment of ; make certain of; fill or close tightly with or as if with a plug; furnish with battens

• “make certain of something“
• “He verified that the valves were closed“
• “See that the curtains are closed“
• “control the quality of the product“

Synonyms

• see the seat within a bishop’s diocese where his cathedral is located ; perceive by sight or have the power to perceive by sight; perceive (an idea or situation) mentally; perceive or be contemporaneous with; imagine; deem to be; get to know or become aware of, usually accidentally; see or watch; come together; find out, learn, or determine with certainty, usually by making an inquiry or other effort; be careful or certain to do something; go to see for professional or business reasons; go to see for a social visit; go to see a place, as for entertainment; take charge of or deal with; receive as a specified guest; date regularly; see and understand, have a good eye; deliberate or decide; observe as if with an eye; observe, check out, and look over carefully or inspect; undergo or live through a difficult experience; accompany or escort; match or meet; make sense of
• check a written order directing a bank to pay money; an appraisal of the state of affairs; the bill in a restaurant; the state of inactivity following an interruption; additional proof that something that was believed (some fact or hypothesis or theory) is correct; the act of inspecting or verifying; a mark indicating that something has been noted or completed etc.; something immaterial that interferes with or delays action or progress ; a mark left after a small piece has been chopped or broken off of something ; a textile pattern of squares or crossed lines (resembling a checkerboard); the act of restraining power or action or limiting excess; obstructing an opponent in ice hockey ; (chess) a direct attack on an opponent’s king ; examine so as to determine accuracy, quality, or condition; make an examination or investigation; be careful or certain to do something; lessen the intensity of; stop for a moment, as if out of uncertainty or caution; put a check mark on or near or next to; slow the growth or development of; be verified or confirmed; be compatible, similar or consistent; block or impede (a player from the opposing team) in ice hockey ; develop (a child’s or animal’s) behavior by instruction and practice; consign for shipment on a vehicle; hand over something to somebody as for temporary safekeeping; abandon the intended prey, turn, and pursue an inferior prey ; stop in a chase especially when scent is lost; mark into squares or draw squares on; decline to initiate betting ; hold back, as of a danger or an enemy; place into check; write out a check on a bank account ; find out, learn, or determine with certainty, usually by making an inquiry or other effort; verify by consulting a source or authority; arrest the motion (of something) abruptly; make cracks or chinks in; become fractured
• insure be careful or certain to do something; make certain of; protect by insurance; take out insurance for
• see to it be careful or certain to do something
• control exercise authoritative control or power over; lessen the intensity of; handle and cause to function; maintain influence over (others or oneself) skillfully, usually to one’s advantage; check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard; place under restrictions; verify by using a duplicate register for comparison; be careful or certain to do something; have a firm understanding or knowledge of; power to direct or determine; a relation of constraint of one entity (thing or person or group) by another; (physiology) regulation or maintenance of a function or action or reflex etc; a standard against which other conditions can be compared in a scientific experiment; the activity of managing or exerting control over something; the state that exists when one person or group has power over another; discipline in personal and social activities; great skillfulness and knowledge of some subject or activity; a mechanism that controls the operation of a machine; a spiritual agency that is assumed to assist the medium during a seance ; the economic policy of controlling or limiting or curbing prices or wages etc.
• ascertain establish after a calculation, investigation, experiment, survey, or study; be careful or certain to do something; find out, learn, or determine with certainty, usually by making an inquiry or other effort; learn or discover with certainty
• assure make certain of; inform positively and with certainty and confidence; assure somebody of the truth of something with the intention of giving the listener confidence; be careful or certain to do something; cause to feel sure; make a promise or commitment