Conscientious, Constant, Continuing, Correct, Critical, Delicate, Demanding, Detailed, Determined, Direct, Dogged, Dour, Draconian, Durable, Enduring, Even, Exact, Exacting, Exigent, Express, Exquisite, Faithful, Fine, Finicky, Firm, Fixed, Flinty, Frozen, Fundamentalist, Fussy, Grim, Hard, Harsh, Headstrong, Hidebound, Immobile, Immovable, Immutable, Implacable, Inelastic, Inexorable, Infallible, Inflexible, Intact, Intransigent, Inviolate, Iron, Irreconcilable, Irremovable, Lasting, Literal, Mathematical, Meticulous, Microscopic, Minute, Narrow, Nice, Obdurate, Obstinate, Orthodox, Painstaking, Particular, Pat, Permanent, Perpetual, Persevering, Persistent, Pinpoint, Precise, Prim, Punctilious, Punctual, Purist, Puritan, Quiescent, Refined, Relentless, Religious, Remaining, Abiding, Accurate, Adamant, Attentive, Austere, Careful, Changeless, Close, Resolute, Resolved, Rigorous, Scientific, Scrupulous, Set, Severe, Solid, Sound, Square, Stable, Starch, Starched, Starchy, Static, Stationary, Staunch, Staying, Steadfast, Steely, Stern, Stiff, Stilted, Stout, Strict, Stringent, Strong, Stubborn, Sturdy, Subtle, Sustained, Taut, Tenacious, Tense, Thorough, Tight, Torpid, Tough, Unaffected, Unalterable, Unaltered, Unbending, Unbreakable, Unchangeable, Unchanged, Unchanging, Unchecked, Uncompromising, Unerring, Unfailing, Unmoved, Unmoving, Unqualified, Unrelenting, Unswerving, Unvarying, Unwavering, Unyielding