Find and Replace several several different values all at once
Since Notepad++ 6.0 it is actually possible without scripts using the following technique:
Find: Text_1 and Replace with: Text_A
Find: Text2 and Replace with: TextB
Find: (Text_1)|(Text2)
Replace: (?1Text_A)(?2TextB)
The general syntax is:
Find: (FindA)|(FindB)|(FindC)...
Replace: (?1ReplaceA)(?2ReplaceB)(?3ReplaceC)...
?1 refers to the first captured phrase and so on.
I got this from the following answer: https://stackoverflow.com/a/16104946/287101
Take a look at Sed. You can easily achieve your goal by only one command line
sed -e "s/Text_1/TextA/" -e "s/Text1/TextB/" <your_file.txt>your_file_new.txt
Using Notepad++, You can either
Open all files containing the words you want to replace and make use of Find / Replace in all open files
Use Find / Replace in files
Record a macro performing the find and replace options and play it back