Here is a usage worksheet on distinguishing between the adjectives fatal and fateful. This document contains a short passage of text explaining the definitions and usage rules of these two adjectives, followed by ten teacher-authored modified cloze exercises.
As usual, this document is based on text adapted from Paul Brians’ excellent book Common Errors in English Usage. As I’ve mentioned repeatedly in posts featuring these documents, Professor Brians, emeritus of Washington State University, has posted the book on that institution’s website, should you want a look at it.
As for the words themselves, well, they mean, essentially, deadly and destined. Enough said.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.