secret approval vs connivance

secret approval and connivance both are nouns.

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

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

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

Other synonyms of secret approval include tacit consent.

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