The phrase "eyesonly" is typically used to indicate that only one person is allowed to view a document or message. There are a few synonyms for this term, including "confidential," "restricted," and "privileged." These words all convey a similar meaning - that the information in question is not meant for widespread distribution. Other relevant terms might include "classified," "secret," or "proprietary." Regardless of the specific language used, it's important to ensure that any information marked as "eyesonly" is handled with the appropriate level of care and discretion. Mismanaging such sensitive materials can have serious consequences.