| English | eng-000 |
| sub-rosa | |
| English | eng-000 | arcane |
| English | eng-000 | backstair |
| English | eng-000 | backstairs |
| English | eng-000 | behind-the-scenes |
| English | eng-000 | bilateral |
| English | eng-000 | confidential |
| English | eng-000 | covert |
| English | eng-000 | dark |
| English | eng-000 | ex-directory |
| English | eng-000 | fiducial |
| English | eng-000 | fiduciary |
| English | eng-000 | head-to-head |
| English | eng-000 | hush-hush |
| English | eng-000 | mystic |
| English | eng-000 | occult |
| English | eng-000 | one-on-one |
| English | eng-000 | person-to-person |
| English | eng-000 | privileged |
| English | eng-000 | privy |
| English | eng-000 | restricted |
| English | eng-000 | sealed |
| English | eng-000 | secret |
| English | eng-000 | sneak |
| English | eng-000 | sneaking |
| English | eng-000 | surreptitious |
| English | eng-000 | tete-a-tete |
| English | eng-000 | under wraps |
| English | eng-000 | under-the-counter |
| English | eng-000 | under-the-table |
| English | eng-000 | undercover |
| English | eng-000 | undisclosed |
| English | eng-000 | unlisted |
| suomi | fin-000 | kahdenkeskinen |
| suomi | fin-000 | kulissientakainen |
| suomi | fin-000 | luottamuksellinen |
| suomi | fin-000 | salainen |
| suomi | fin-000 | sub-rosa |
| русский | rus-000 | конфиденциальный |
| русский | rus-000 | тайный |
| español | spa-000 | secreto |