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