permanence

As a noun permanence

is the state of being permanent.

As an adjective timeless is

eternal.

Permanence is a related term of prolongation.

As nouns the difference between permanence and prolongation

is that permanence is the state of being permanent while prolongation is the act of prolonging.

As nouns the difference between fortitude and permanence

is that fortitude is mental or emotional strength that enables courage in the face of adversity while permanence is the state of being permanent.

Endurance is a synonym of permanence.

As nouns the difference between endurance and permanence

is that endurance is the measure of a person's stamina or persistence while permanence is the state of being permanent.

Permanence is a related term of protraction.

As nouns the difference between permanence and protraction

is that permanence is the state of being permanent while protraction is (uncountable) the condition of being protracted.

As a noun permanence is

the state of being permanent.

Resolution is a related term of permanence.

As nouns the difference between resolution and permanence

is that resolution is resolution while permanence is the state of being permanent.

Pertinacity is a related term of permanence.

As nouns the difference between pertinacity and permanence

is that pertinacity is the state or characteristic of being pertinacious while permanence is the state of being permanent.

Tenaciousness is a related term of permanence.

As nouns the difference between tenaciousness and permanence

is that tenaciousness is the characteristic of being tenacious while permanence is the state of being permanent.

Perseverance is a related term of permanence.

As nouns the difference between perseverance and permanence

is that perseverance is perseverance (persistent determination to adhere to a course of action; insistence) while permanence is the state of being permanent.