| between us(expression, adjective, adverb, sensitive, confidential) |
| between you and me(expression, idiom, adverb, confidence, personally) |
| clandestine(adjective, special, intimate, personal, confidential) |
| closet(special, intimate, private, personal, confidential) |
| concealed(adjective, separate, secret, personal, confidential) |
| covert(adjective, separate, secret) |
| covertly(secretly, personally, privately, confidentially) |
| esoteric |
| eyes-only(adjective, adverb, sensitive, confidential, not) |
| for no other ears(expression, adjective, idiom, adverb, sensitive) |
| hidden(adjective, separate, secret, personal, confidential) |
| hushed(adjective, special, intimate, secret, private) |
| in secret(expression, adverb, secretly, personally, privately) |
| informal(adjective, unauthorized) |
| not public(expression, adjective, secret, private, confidential) |
| not to be quoted(expression, adjective, idiom, adverb, sensitive) |
| personally(secretly, privately, confidentially) |
| record |
| sealed |
| undisclosed(adjective, personal, confidential, hush-hush) |