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