behind-the-scenes vs sub-rosa

behind-the-scenes and sub-rosa both are adjectives.

Word	Noun	Adjective	Verb	Adverb
behind-the-scenes	No	Yes	No	No
sub-rosa	No	Yes	No	No

As adjectives, behind-the-scenes and sub-rosa are synonyms defined as:

behind-the-scenes and sub-rosa: designed and carried out secretly or confidentially

Other synonyms of behind-the-scenes include under-the-table.

behind-the-scenes (adjective)	sub-rosa (adjective)
designed and carried out secretly or confidentially	designed and carried out secretly or confidentially