"Certainness" is a word in ENGLISH

Incomprehensibility of things; the doctrine held by the ancient Skeptic philosophers, that human knowledge never amounts to certainty, but only …

To know or learn with certainty.

To find out or learn for a certainty, by trial, examination, or experiment; to get to know; as, to ascertain …

The act of ascertaining; a reducing to certainty; a finding out by investigation; discovery.

Assurance; certainty.

Anything fixed or reduced to a certainty in point of time, number, quantity, quality, weight, measure, etc.; as, rent of …

The state of being assured; firm persuasion; full confidence or trust; freedom from doubt; certainty.

The state of being assured; certainty; full confidence.

Assent to a proposition or affirmation, or the acceptance of a fact, opinion, or assertion as real or true, without …

To have a firm persuasion, esp. of the truths of religion; to have a persuasion approaching to certainty; to exercise …

Certainty.

of Certainty

A fact or truth unquestionable established.

Clearness; freedom from ambiguity; lucidity.

The quality, state, or condition, of being certain.

In pleading. Distinct-ness; dearness of statement; particularity. Such precision and explicitness in the state-ment of alleged facts that the pleader’s …

Freedom from doubt; assurance; certainty.

Sure as death; unerring; fixed; complete; as, a dead shot; a dead certainty.

The state of being definite; determinateness; precision; certainty.

One who demonstrates; one who proves anything with certainty, or establishes it by indubitable evidence.