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