putatively

to all outward appearances the lake's putatively pristine water is actually crawling with microorganisms that can wreak havoc with your gastrointestinal system Synonyms evidently, ostensibly, ostensively, presumably, apparently, seemingly, supposedlyRelated Words externally, outwardly, visibly; believably, credibly; assumably, likely, presumedly, probably; conceivably, maybe, mayhap, perchance, perhaps, possibly, professedly, supposably; allegedly, purportedly, reportedly, reputedly; clearly, distinctly, manifestly, obviously, plainly, self-evidently; assuredly, positively, surelyNear Antonyms implausibly, impossibly, improbably, incredibly