immutable Synonyms - page 2

fixed immortal immovable imperishable inalterable established enduring ageless cast iron consistent constant continuing deathless diuturnal durable durative incommutable indefeasible irresilient irretrievable irreversible irrevocable lasting longevous long-lived nonelastic perdurable irrepealable irreparable indestructible indissoluble inductile ineradicable inflexible intransmutable invariable invariant ironclad perennial