Words That Rhyme With "Frustum" :
2 syllables:
bussen, button, custom, Dunstan, dustman, glutton, Huston, Hutton, justen, lustrum, mutton, Paestum, Sutton, system, tungsten, Tuscan
3 syllables:
accustom, Augustan, molluscan, molluscum, unbutton, uncustomed