Synonyms of audibly

2 Syllables
plainly, sharply, clearly, aloud
3 Syllables
markedly, surely, openly, seemingly, lucidly, overtly, patently, purely, certainly, obviously, distinctly
4 Syllables
conspicuously, evidently, undeniably, undoubtedly, acutely, discernibly, manifestly, noticeably, perceptibly, prominently, sonorously, translucently, transparently, precisely, apparently, decidedly
5 Syllables
incontestably, penetratingly, indubitably, positively, recognizably, unmistakably, definitely
6 Syllables
incontrovertibly