Here’s a worksheet on the Greek word root acro, which means high, extremity, and tip.
As you’ll see if you review or use this document–I’m fairly certain I’ve never used it in the classroom–this root produces some relatively specialized words in English. The most common among the assortment are acronym (presumably because one only uses the tips or extremities of words to form acronyms), acrobat (for obvious reasons), and acrophobia, which means, of course, “abnormal dread of being in a high place”, or more simply, “fear of heights.”
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.