Python librerie for synonyms of german words

I am trying to generate a list of synonyms for given german words for a project.

I have tried the python librerie wn (not related to NLTK WordNet), here is my code:

import wn, wn.taxonomy

wort = wn.synsets('Bürger')[0]
for path in wn.taxonomy.hypernym_paths(dog):
    for i, ss in enumerate(path):
        print(' ' * i, ss, ss.lemmas()[0])

The problem is when I run the code by giving a list of words it only gives results for about half of the words.