firm Synonyms - page 8

puristic proprietorship proof perseverant persevering persisting pertinacious petrified pig-headed positive pouched practical procrustean resolved irreversible gluey impenetrable imperishable impermeable implacable impliable impregnable inalterable incompliant incompressible incorruptible immutable immune immobile gritty hardened hard-handed hard-shell hermetic hidebound holdfast house hovelling immalleable indefatigable indissoluble intent intractable intransigent invariable invariant invincible invulnerable iron ironbound