perform a quick delete of rows containing one of several different words

I need to be able to delete rows that 'do not' contain one of 5 different words. The spreadsheet contains several thousand rows so I am looking for a way to delete them quickly. I have this piece of code which deletes quickly but it deletes the rows containing the word, if I could change it to delete anything that is 'not equal' to these words it would be fine. Or a new macro :-)

Dim i As Long
    Application.ScreenUpdating = False
    For i = Cells(Rows.Count, 2).End(xlUp).Row To 1 Step -1
        If InStr(1, Cells(i, 2).Value, "ONE", 1) Or _
        InStr(1, Cells(i, 2).Value, "TWO", 1) Or _
        InStr(1, Cells(i, 2).Value, "THREE", 1) Or _
        InStr(1, Cells(i, 2).Value, "FOUR", 1) Or _
        InStr(1, Cells(i, 2).Value, "FIVE", 1) _
        Then Cells(i, 2).EntireRow.Delete
    Next i

Thanks