Complex coding Regex -- 2

I need a regex champ. Here is what I need . I will provide few keywords on a column on excel file and I need another column populated grouping them by matching keywords Logics 1) Minimum matching 2 words 2) when grouping a - in keywords should be treated as space 3) slight changes on keywords like singular and plural should be treated same book , books 4) also typo facebook and face book anti virus and antivirus antiviras