sub-rosa vs under-the-table

sub-rosa and under-the-table both are adjectives.

Word	Noun	Adjective	Verb	Adverb
sub-rosa	No	Yes	No	No
under-the-table	No	Yes	No	No

As adjectives, sub-rosa and under-the-table are synonyms defined as:

sub-rosa and under-the-table: designed and carried out secretly or confidentially

Other synonyms of sub-rosa include behind-the-scenes.

sub-rosa (adjective)	under-the-table (adjective)
designed and carried out secretly or confidentially	designed and carried out secretly or confidentially