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