Home Misspellings How to spell frustrum? Frustrum or frustum? Which one is correct? by hersey November 2, 2018 Reading Time: 0min, 7sc + - 0 Frustrum or frustum Which one is correct? You can find the answer below. Incorrect Frustrum Correct Frustum You can find more information about Frustum word here. Rate this post Correct spelling of FrustrumHow do you spell Frustrum