secreter

any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream
not open or public; kept private or not revealed;
conducted with or marked by hidden aims or methods;
not openly made known;
communicated covertly;
not expressed;
designed to elude detection;
hidden from general view or use;
(of information) given in confidence or in secret;
indulging only covertly;
having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding;
the next to highest level of official classification for documents

secreter is a valid Scrabble (US) TWL word

secreter is a valid Scrabble Word in Merriam-Webster MW Dictionary

secreter is a valid Scrabble Word in International Collins CSW Dictionary

secreter is a valid Words With Friends word