Clandestine and Sub-rosa

Clandestine adjective - Undertaken or done so as to escape being observed or known by others.

Sub-rosa and clandestine are semantically related In some cases you can use "Sub-rosa" instead an adjective "Clandestine".

Sub-rosa adjective - Designed and carried out secretly or confidentially.

Clandestine and sub-rosa are semantically related in secret topic. You can use "Clandestine" instead an adjective phrase "Sub-rosa", if it concerns topics such as sneaky, deceitful, underhand, stealthy.