If you don’t want to mark them known, and if you don’t want to make lingqs, then you can ignore them. There is a button for that and a keyboard shortcut: “x”.
If it’s a real word it makes sense to make a ling. But maybe you don’t want it to appear in the vocabulary drills? Maybe there is some advice on how to deal with that. I don’t know, though, because I rarely use the drills, and when I do I just accept whatever collection of words it chooses to present.
Edit: The other choice is to leave the uninteresting words blue. There is an option to not move words to known when advancing to the next page.