List of rigidly synonyms and rigidly related words.
abidingly, absolutely, adamantly, always, changelessly, dead, definitely, directly, dourly, enduringly, even, exactly, expressly, faithfully, firmly, grimly, hardly, immovably, immutably, implacably, impliably, in all respects, in every respect, inexorably, inflexibly, intransigently, invariably, ipsissimis verbis, ironhandedly, irreconcilably, just, lastingly, literally, literatim, obdurately, permanently, perpetually, plumb, point-blank, positively, precisely, primly, relentlessly, right, rigorously, square, squarely, statically, steadfastly, sternly, stiffly, stiltedly, straight, strictly, to the letter, unalterably, unbendingly, unchangeably, unchangingly, uncompromisingly, undeviatingly, unerringly, unregenerately, unrelentingly, unwaveringly, unyieldingly, verbally, verbatim, verbatim et litteratim, word by word, word for word