Words That Rhyme With "Forgetfulness" :

3 syllables:

doubtfulness, dreadfulness, fitfulness, fretfulness, frightfulness, fruitfulness, gratefulness, hatefulness, helpfulness, rightfulness, specialness, spitefulness, thoughtfulness, vengefulness

4 syllables:

deceitfulness, delightfulness, despitefulness, especialness, eventfulness, respectfulness, revengefulness, ungratefulness, unthoughtfulness