Have a load of pictures of vocabulary you are drilling on the board.
You point to a picture and say the vocabulary. If you’ve said the right word, the students need to repeat it. If you said the wrong word, the students need to not repeat it! I always start by doing a first round of the words all being correct to remind students of the correct vocabulary.
If they don’t get caught out (and stay quiet), they get a point.
If one member of the class repeats the wrong word (as inevitably happens), you get a point. Aim is for the class to beat you. Simple? Not really, as some kids will then start dropping the others in it just for fun by shouting out words they know are wrong!
The aim for you as a teacher, is to get students repeating the correct vocabulary as much as possible and not the incorrect!