Synonyms of the word

validity

• n. The state of being valid, authentic or genuine.
• n. Having legal force.
• n. A quality of a measurement indicating the degree to which the measure reflects the underlying construct,…

believability

• n. The state or quality of being believable.

cogency

• n. The state of being cogent; the characteristic or quality of being reasonable and persuasive.

credibility

• n. Reputation impacting one's ability to be believed.
• n. (law) Believability of statements by a witness, as measured by whether the testimony is probable or improbable…

credibleness

• n. The state or quality of being credible.

legality

• n. Lawfulness.

rigor

• n. US spelling of rigour.
• n. (slang) an abbreviated form of rigor mortis.

rigour

• n. Severity or strictness.
• n. A trembling or shivering response.
• n. Character of being unyielding or inflexible.
• n. Shrewd questioning.
• n. Higher level of difficulty.
• n. (Britain, slang) Misspelling of rigor. An abbreviated form of rigour mortis.

validness

• n. the state of being valid.