You've already got it right in the capture you uplaoded.
The words displayed with strikethroughs will not be counted as a "word" in the wordlist. You can save the wordlist as a plain text file or an Excel file.
What you did is called lemmatization, grouping different inflectional forms to one single base form entry--the so called "lemma".
you can also use a stoplist, that is to say, put what you don't need in the stoplist and when you make a wordlist ,these worsds in the stoplists will not occur.