function `get_sim_Words` contains many mistakes

The function `get_sim_words` contains varied errors, so the main cannot run.
- The name contains a cap on the "W" at some places and this does not work in the first place.
- There are undefined variables in the function.
- Some "self." calls are missing, so there are even more undefined variables.
- There is an unused argument in the function.
- There may be more errors past that point.