Here's what rhymes with unamusingly.
amusingly musingly accusingly confusingly Words that almost rhyme with unamusingly
approvingly soothingly movingly reprovingly disapprovingly musically broodingly foolishly brutishly ghoulishly prudishly unassumingly nudity abusively allusively elusively rebukingly conclusively impunity reputedly unobtrusively acoustically effusively inclusively obtrusively intrusively delusively doohickey incongruity gratuity fatuity exclusively incredulity perpetuity discontinuity