Words That Rhyme With "Heightening" :
3 syllables:
battening, brightening, fattening, flattening, frightening, lichenin, lightening, likening, ripening, straightening, sweetening, tightening, vitamin, widening
battening, brightening, fattening, flattening, frightening, lichenin, lightening, likening, ripening, straightening, sweetening, tightening, vitamin, widening