Remove duplicate words after stripping punctuation

Question

Let's say I have a file with the following contents:

VSDmaMapInfo
VSDmaMapInfo::
VSDmaMapInfo;
VSPortErr
VSPortErr,
VSPortErr::

and after sorting I wanted the output to be

VSDmaMapInfo
VSPortErr

Is there any way to do it using either grep, awk, uniq,or any other tools etc

Thanks a lot for your help.

Answer 1

$ awk -F'[[:punct:]]' '{print $1}' file | sort -u
VSDmaMapInfo
VSPortErr

Answer 2

Code for sorted content with GNU sed

sed -r '$!N;/(\w+)\W*\n\1\W*/!{s/(\w+).*/\1/;P};D' file