Here's what rhymes with captivatingly.
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ragingly engagingly evasively scathingly basically amazingly unfailingly pervasively rakishly piratically creatively persuasively legislatively prosaically unavailingly imitatively jadedly appreciatively meditatively animatedly exaggeratedly entertainingly abrasively complicatedly qualitatively authoritatively administratively algebraically collaboratively exasperatedly uncomplainingly lackadaisically manipulatively