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