Synonyms and related words :
Sabbatarian, airtight, ardent, bigoted, calculable, close, committed, compact, consistent, constant, creedbound, dedicated, dependable, devoted, dogmatic, dustproof, dusttight, evangelical, faithful, faithworthy, fast, firm, firm as Gibraltar, fixed, flinty, fundamentalist, gasproof, gastight, hermetic, hermetically sealed, hidebound, hyperorthodox, immovable, inflexible, infrangible, invincible, liege, lightproof, lighttight, literalist, literalistic, long-lasting, loyal, made of iron, marble-constant, oilproof, oiltight, precisianist, precisianistic, predictable, purist, puristic, puritanical, rainproof, raintight, reliable, resolute, rigid, rugged, sealed, seaworthy, secure, set, settled, shut fast, smokeproof, smoketight, snug, solid, sot, sound, stable, steadfast, steady, steely, stormproof, stormtight, stout, straitlaced, strict, strong, sturdy, substantial, sure, surefire, tested, tight, tough, tried, tried and true, TRUE, true-blue, trusted, trustworthy, trusty, unbending, unbreakable, undeflectable, undeviating, unfailing, unfaltering, unflappable, unflinching, unshaken, unshrinking, unswerving, unwavering, unyielding, water-repellant, waterproof, watertight, well-built, well-constructed, well-founded, well-grounded, well-made, windproof, windtight