There is a variety of lexicological online-exercises to be found. They help
preparing for exams and analysing one's lexicological knowledge. Of course,
they should be thoroughly worked through.
Most exercises consist of a range of exemplary words which have to be
matched with their counterpart.
In other instances, the solution has to be
filled in by hand or marked with a mouse-click.
The exercises are from Rene Adam (transl. by Dankmar Enke).