1. Mind map
I asked my students to hand in a mind map with definitions of synonyms, antonyms and hypernyms, then provide some examples. Here are some results:
2. Reading & Field work
To get synonyms and antonyms, I asked the students to take 10 unfamiliar words from the textbook or any reading material, and find, using dictionary, their synonyms and antonyms. For hypernyms, I ask them to go to the cooperative, list down all items they sell, and group them in one-word-categories. No results to show, but some of them really like using bombastic words, and very good at finding their synonyms and antonyms.
Still, some copied from their friends, but it's alright, since at least they have the initiative to get information. It is research anyway.