Code:
on @*:text:*:#: {
  if ( %rep_tid1 == $null ) { set %rep_tid1 $60 }
  if ( %rep_ban1 == $null ) { set %rep_ban1 $300 }
  if ( %rep_antal1 == $null ) { set %rep_antal1 $4 }
  if ($nick isop $chan) { halt }  
  if ($nick isvoice $chan) { halt }
  if ($nick == null) { return }

  var %rp.repeats = rp. $+ $nick $+ . $+ $chan
  var %rp.text = rp. $+ $nick $+ . $+ $chan $+ .text
  if ( % [ $+ [ %rp.repeats ] ] == $null ) { 
    set -u [ $+ [ %rep_tid1 ] ] % [ $+ [ %rp.repeats ] ] 1
    set -u [ $+ [ %rep_tid1 ] ] % [ $+ [ %rp.text ] ] $1- 
  }
  elseif ( % [ $+ [ %rp.text ] ] == $1- ) {
    inc % [ $+ [ %rp.repeats ] ]
    inc -u10 $+(%,sw,$nick) 1
  }
  elseif ( % [ $+ [ %rp.text ] ] != $1- ) {
    set -u [ $+ [ %rep_tid1 ] ] % [ $+ [ %rp.text ] ] $1-
    set -u [ $+ [ %rep_tid1 ] ] % [ $+ [ %rp.repeats ] ] 1
  }
  if ( % [ $+ [ %rp.repeats ] ] >= %rep_antal1 ) {
    .msg # 15,1[9,1 $nick 15]15,01[08 has been muted for 5Min for breaking the 3Spams/Min rule 15]
    ban -u $+ %rep_ban1 # $nick %bs
    unset %rp. $+ $nick $+ . $+ $chan
    unset %rp. $+ $nick $+ . $+ $chan $+ . $+ text
  }
}

From this script. How do i add the Word ban in like Spartar gave.