Words That Rhyme With "Regrettably" :
3 syllables:
festally, mentally, notably, suitably, vegetably
4 syllables:
acceptably, contentedly, forgetfully, fragmentally, impeccably, parentally, respectably
5 syllables:
accidentally, compartmentally, complementally, continentally, departmentally, detrimentally, dialectally, elementally, fundamentally, incidentally, incrementally, instrumentally, interdentally, monumentally, ornamentally, regimentally, sacramentally, sentimentally, temperamentally, transcendentally, unacceptably
6 syllables:
coincidentally, developmentally, environmentally, experimentally, unsentimentally