firm

able-bodied adamantine adamant agencies agency all-or-nothing al dente allegiant assertive bent bound brave bravest business businesses carved in stone certain close companies compact company concern condensed conservative concrete constant crisp decisive decided determined determinate die-hard dictatorial die-hard/diehard dogged durable earnest employer enterprise entrenched enterprises erect establishment factory factories faithful fast fast faster faster fastest fastest fixed fixed flinty gutsy harden harder harder hard-bitten hard-boiled hardy hard hard healthy healthiest hell-bent house houses immovable impenetrable implicit impregnable inalterable inarguable incompliant incontestable indissoluble indurate inferred inflexible intent ironclad iron liege loyal manful more concrete more constant more compact more durable more loyal more solid more solid more rigid more undisputable more positive most certain most loyal most undisputable motionless mounted mulish neck and neck obdurate obstinate old outfit partnerships partnership peremptory persistent pertinacious positive puissant purposeful realest real refractory resolute responsible reliable rigid rocky rooted sealed secure secure set severe sinewy single-minded solidify solid solid solvent solidifies sound stable stabilize stark steadfast staunchest staunch steady stiffen stiff stock-still stony stricter strict strictest strong strong strong stubborn sturdy substantial supported sure sure surest surest taut tenacious tenacious tense thick thick tighter tighter tight tight tightest tightest tough tough toughest toughest tougher tougher traditionalistic traditionalist true-blue true unalterable unassailable unbendable unbending unchangeable unbreakable unchanged uncompliant uncompromising undisputable undoubting undoubting unfaltering unhesitating unflinching unflinching unqualified unmovable unmoved unquestioning untiring unswayed unshaken unshakable unswerving unuttered unwavering unyielding