I use this activity with my high school Zoology course. The first chapter is full of lots of vocabulary words for the students to learn - many of them "ology" words - the study of this or the study of that. My students often get things like ichthyology vs entomology confused.
In this activity, I've created a worksheet that gives students 7 pairs of these intro words that are often confused on tests. Students may choose to make a table or Venn diagram and do a compare/contrast to show their understanding of these words.
You will receive a 1 page Word document so that you may edit as needed.