If blocking/quarantining an email owing to detection of a word from a (custom) Dictionary (keyword) list and sending a Notification, there is no variable to insert into the Notification (or attached report) that would indicate to the sender/recient the particular word that triggered the detection.
In the case of Prfanity, for example, the Sender could then attempt to resend the email after removing the offending word without IT intervention.
The administrator can see the keyword in the summary of the quarantined email on the gateway admin interface.