The following procedure will move any email containing the words 'viagra OR Cialis' to a SPAM folder.
Create a SPAM folder by right clicking 'Inbox' and selecting 'New Folder'.
At the top of the Outlook screen click Tools > Rules Wizard > New
Highlight 'Check messages when they arrive' and click 'Next'
Select the tick box show below and click on 'specific words' in the Rule Description box.
Type filter words one at a time and press 'Add'. Press 'OK'.
Select 'move it to the specified folder'
Click on the word 'specified' and select the SPAM folder.
Type a name for the new rule and ensure 'Turn on this rule' is ticked. Click 'Finish'
Once the rule is active, any mail containing the filter words in the subject or body text will be moved to the SPAM folder.
It is possible to amend the rule to filter additional words or to delete SPAM mail rather than move it.