THESAURUS
faithfully
absolutely, acquiescently, assiduously, bona fide, compliantly, consistently, constantly, dead, definitely, descriptively, devotedly, diligently, directly, doggedly, duteously, dutifully, even, exactly, expressively, expressly, firmly, graphically, in all respects, in compliance with, in conformity with, in every respect, in good faith, in obedience to, indefatigably, industriously, insistently, ipsissimis verbis, just, literally, literatim, loyally, naturalistically, obediently, patiently, perseveringly, persistently, persistingly, pertinaciously, ploddingly, plumb, point-blank, positively, precisely, realistically, relentlessly, representatively, resolutely, responsibly, right, rigidly, rigorously, sedulously, sloggingly, square, squarely, staunchly, steadfastly, steadily, straight, strictly, submissively, tenaciously, tirelessly, to the letter, unabatingly, undeviatingly, unerringly, unfalteringly, unflaggingly, unflinchingly, unintermittingly, uninterruptedly, unrelentingly, unremittingly, unrestingly, unsleepingly, unswervingly, untiringly, unwaveringly, unwearyingly, verbally, verbatim, verbatim et litteratim, vividly, wearilessly, willingly, with good faith, word by word, word for word
ROGET THESAURUS
faithfully
Observance
N
observance, performance, compliance, acquiescence, concurrence, obedience, fulfillment, satisfaction, discharge, acquittance, acquittal, adhesion, acknowledgment, fidelity, exact, observance, observant, faithful, true, loyal, honorable, true as the dial to the sun, true as the needle to the pole, punctual, punctilious, literal, as good as one's word,
faithfully, ignoscito saepe alteri nunquam tibi, tempori parendum, to God, thy country, and thy friend be true.