tried and true, kosher, unquestionable, bona fide, stable, principled, unimpeachable, strong, veritable, dangerous, respectable, rock-steady, unfailing, solid, irresponsible, sincere, sound, safe, veracious, infallible, authorized, decent, accredited, upright, steady-going, solvent, sure, candid, careful, unswerving, incorruptible, false, proved, genuine, honorable, current, irrefutable, incontestable, honest, regular, workable, trust, guaranteed, righteous, reputable, insecure, tested, credible, tried, authentic, positive, original, real, foolproof, unequivocal, straight, sterling, substantial, authoritative, undependable, conclusive, time-tested, OK, accepted, good, undeviating, assured, competent, all right, secure, responsible, truthful, legitimate, received
reliable (part of speech: adjective)
resolute (part of speech: adjective)
implacable, unwavering, valiant, decided, indomitable, steady, dauntless, decisive, unflinching, stubborn, willing, resolved, dogged, thorough, ruthless, hearty, steadfast, unchangeable, iron-willed, constant, true, plucky, insistent, unyielding, unshakeable, bold, devoted, loyal, stern, strong-minded, relentless, diligent, steely, indefatigable, courageous, persistent, determined, tenacious, committed, tough, bullheaded, serious, uncompromising, staunch, resolute, faithful, firm, deliberate, zealous, set, unbending, tireless, headstrong, earnest, intent, inexorable, dedicated, strong-willed, spunky, persevering, fearless
- But even the most reliable beliefs of this type fail when they confront the novel. - "How We Think", John Dewey.
- This wasn't a communications job, but I wanted a reliable man handling it. - "Greylorn", John Keith Laumer.
- Now, the people to choose for your family party are, first, the Reliable Person. - "Stray Thoughts for Girls", Lucy H. M. Soulsby.