Dear all,?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

I would like to prevent users from writing specific words in a free text field. I created a validation rule for one word (e.g. "Other").

Application_Other__c="Other"

Now they can't write the word "Other" in that field, but how do I add more words? For example I don't want them to enter "Other", "Others", "Unknown" and "Not known"?

Thanks and best regards
Adriano