Conditional formatting - Highlight words from a li

Question

I have a list of values in column A named "Our Keywords" and another list of values from multiple columns from competitors named "Competitor keywords"

Using conditional formatting, how can I highlight the keywords that appear in "Competitor keyword" columns but not in "Our keywords" column. And vice versa keywords that are unique to the "our keywords" column.

e.g. problem:

e.g. desired result:

The words that appear in column 1 ONLY are highlighted green and words that appear in the competitor columns but NOT in column 1 are highlighted red.

Answer 1

green color:

• apply to range A1:A custom fx: =FILTER(A1, NOT(COUNTIF(B1:E, A1)))

red color:

• apply to range B1:B custom fx: =FILTER(B1, NOT(COUNTIF(A$1:A, B1)))
• apply to range C1:C custom fx: =FILTER(C1, NOT(COUNTIF(A$1:A, C1)))
• apply to range D1:D custom fx: =FILTER(D1, NOT(COUNTIF(A$1:A, D1)))
• etc.