Orthodox Jew, Sabbatarian, Sunni Muslim, bigoted, bitter-ender, canonist, conservative, creedbound, dogmatic, dour, evangelical, firm, hard, hidebound, hyperorthodox, impliable, inexorable, inflexible, iron, ironbound, ironclad, ironhanded, literalist, literalistic, muscle-bound, obdurate, obstinate, old liner, orthodox, orthodox Christian, orthodoxist, precisianist, precisianistic, procrustean, purist, puristic, puritan, puritanic, puritanical, relentless, right-winger, right, rightist, rigid, rigorist, rigoristic, rigorous, rockbound, standpat, standpatter, staunch, stiff, straightlaced, straitlaced, strict, stubborn, textualist, textuary, the orthodox, tory, true believer, unbending, uncompromising, unrelenting, unyielding