Difficult words are usually only unfamiliar words; for that reason, difficult words should not be eliminated from a speech, especially if such words carry the most precise sense that the speaker means. A speech, indeed, intends to carry meaning as concisely and directly as possible. If anything, difficult words should be learned and appropriated to enrich your vocabulary and your oratory skills.
I think this not just because I don't know the answer its because you said page: book and they are close to each other so dirt: grass are close to each other.