Yes there are many. Altogether there are several thousands of words of German origin and most of them aren't used any more in current Polish. The others are adapted. Some changed to a degree that it isn't obvious what was the source of the word. It is said that „dziękować” and „dziękuję” is a cognate of „danken” and „danke”. Mistrz comes from Old Czech mistrz, mistr, which itself is from Old High German meister, which itself comes from latin magister. -ostwo is a Polish suffix.
The link below leads to a dictionary of German loanwords in Polish: