firmness Synonyms - page 3

intrepidity invariability inveteracy invincibility iron lustiness obduracy obstinacy permanence permanency perseverance persistence persistency pertinacity inflexibility infallibleness heroism immobility immovability immovableness immutability impenitence implacability indefatigability indestructibility indissolubleness inelasticity inerrability inerrableness inerrancy phagedenic