connivance vs secret approval

connivance and secret approval both are nouns.

Word	Noun	Adjective	Verb	Adverb
connivance	Yes	No	No	No
secret approval	Yes	No	No	No

As nouns, connivance and secret approval are synonyms defined as:

connivance and secret approval: (law) tacit approval of someone's wrongdoing

Other synonyms of connivance include tacit consent.

connivance (noun)	secret approval (noun)
agreement on a secret plot	(law) tacit approval of someone's wrongdoing
(law) tacit approval of someone's wrongdoing