firm

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