Confirm vs. Sure — What's the Difference?

To support or establish the certainty or validity of; verify

Confident, as of something awaited or expected

To reaffirm the establishment of (a reservation or advance arrangement).

Impossible to doubt or dispute; certain

To make firmer; strengthen

Bound to come about or happen; inevitable

To make valid or binding by a formal or legal act; ratify.

Having one's course directed; destined or bound

To administer the religious rite of confirmation to.

Certain not to miss, slip, or err; steady

To strengthen; to make firm or resolute.

Not hesitating or wavering; firm

To administer the sacrament of confirmation on (someone).

Worthy of being trusted or depended on; reliable

To assure the accuracy of previous statements.

Free from or marked by freedom from doubt

To make firm or firmer; to add strength to; to establish; as, health is confirmed by exercise.

Careful to do something

To strengthen in judgment or purpose.

(Obsolete) Free from harm or danger; safe.

To give new assurance of the truth of; to render certain; to verify; to corroborate; as, to confirm a rumor.

Surely; certainly.

To render valid by formal assent; to complete by a necessary sanction; to ratify; as, to confirm the appoinment of an official; the Senate confirms a treaty.

Physically secure and certain, non-failing, reliable.

To administer the rite of confirmation to. See Confirmation, 3.

Certain in one's knowledge or belief.

Establish or strengthen as with new evidence or facts;

(followed by a to infinitive) Certain to act or be a specified way.

Strengthen or make more firm;

(obsolete) Free from danger; safe; secure.

Make more firm;

(obsolete) Betrothed; engaged to marry.

As of a person to a position;

(modal adverb) Without doubt, certainly.

Administer the rite of confirmation to;

(archaic) Without fail, surely.

Yes, expressing noncommittal agreement or consent.

Yes; of course.

You're welcome; polite response to being thanked.

Certainly knowing and believing; confident beyond doubt; implicity trusting; unquestioning; positive.

Certain to find or retain; as, to be sure of game; to be sure of success; to be sure of life or health.

Fit or worthy to be depended on; certain not to fail or disappoint expectation; unfailing; strong; permanent; enduring.

Betrothed; engaged to marry.

Free from danger; safe; secure.

In a sure manner; safely; certainly.

Having or feeling no doubt or uncertainty; confident and assured;

Exercising or taking care great enough to bring assurance;

Certain to occur; destined or inevitable;

Physically secure or dependable;

Capable of being depended on;

(of persons) worthy of trust or confidence;

Infallible or unfailing;

Certain not to fail;

Impossible to doubt or dispute;

Definitely or positively (`sure' is sometimes used informally for `surely');