rigorously Synonyms

strictly the letter heedfully ascetically assiduously severely precisely to the letter pitilessly sedulously verbatim verbally veraciously unerringly trustily throughly thoroughly strongly methodically meticulously uncompromisingly stringently scrupulously reliably punctiliously oppressively like fury relentlessly in detail in depth fiercely faithfully exactingly discreetly exhaustively faultlessly obdurately stiffly sternly starkly frostily firmly exactly critically correctly conscientiously connectively concernedly comprehensively completely