firm

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