Synonyms of the word

permanency

• n. The state or quality of permanence.

duration

• n. An amount of time or a particular time interval.
• n. (in the singular, not followed by "of") The time taken for the current situation to end, especially the…
• n. (finance) A measure of the sensitivity of the price of a financial asset to changes in interest rates,…

length

• n. The distance measured along the longest dimension of an object.
• n. duration.
• n. (horse racing) The length of a horse, used to indicate the distance between horses at the end of a race.
• n. (mathematics) Distance between the two ends of a line segment.
• n. (cricket) The distance down the pitch that the ball bounces on its way to the batsman.
• n. (figuratively) Total extent.
• n. Part of something that is long; a physical piece of something.
• v. (obsolete) To lengthen.

permanence

• n. The state of being permanent.
• n. (physics) The reciprocal of magnetic inductance.