Words That Rhyme With "Fleetingly" :
3 syllables:
beamingly, bitingly, breathingly, creakingly, cuttingly, dotingly, feelingly, fittingly, freezingly, gratingly, greedily, healingly, heatedly, mattingly, schemingly, screamingly, seemingly, sneakingly, speedily, streamingly, sweepingly, teasingly, teemingly, wheezingly, wittingly, yieldingly
4 syllables:
appealingly, befittingly, beseechingly, conceitedly, decreasingly, demeaningly, exceedingly, excitingly, increasingly, intriguingly, invitingly, repeatedly, unceasingly, unfeelingly, unreasoningly, unwittingly