Using grep/cat as a dictionary in UNIX

Question

I need to make it so the words in my text file are checked for if they appear in a dictionary text file. I need it to output the words that do not appear in the text file.

I currently have: cat text.txt | grep -vi english.txt

text is the text file of words that need to be checked and english.txt is my dictionary. Currently, I just get back all of the words that are in my text.txt file (where I am purposely putting words that should not go through, meaning they are in the dictionary), what am I doing wrong?

(This is for hw so I have to use cat/grep)

Answer 1

try this line:

grep -viFf english.txt text.txt

If this didn't work for your file, you need give some example lines of your text.txt and english.txt.