The word "caveat" means a warning or caution about something important to keep in mind. It is often used to alert someone to potential problems or limitations before they proceed with a certain action or decision. Full definition
One such field is construction, though there are a couple of caveats in the field's growth itself. (theamericangenius.com)
An important caveat with regard to professional memberships: The portion of your membership dues attributable to lobbying and political advocacy is not deductible. (realtormag.realtor.org)