Words That Rhyme With "Inactiveness" :

3 syllables:

activeness

4 syllables:

abstractiveness, adaptiveness, attractiveness, combativeness, constructiveness, defectiveness, destructiveness, directiveness, effectiveness, electiveness, inductiveness, instructiveness, invectiveness, objectiveness, productiveness, protectiveness, reflectiveness, refractiveness, respectiveness, restrictiveness, seductiveness, selectiveness, subjectiveness, vindictiveness

5 syllables:

ineffectiveness, introspectiveness, reconstructiveness, retrospectiveness, unattractiveness, unproductiveness