seal of approval vs cachet

seal of approval and cachet both are nouns.

Word	Noun	Adjective	Verb	Adverb
seal of approval	Yes	No	No	No
cachet	Yes	No	No	No

As nouns, seal of approval and cachet are synonyms defined as:

seal of approval and cachet: an indication of approved or superior status

Other synonyms of seal of approval include seal.

seal of approval (noun)	cachet (noun)
an indication of approved or superior status	a seal on a letter
	an indication of approved or superior status
	a warrant formerly issued by a French king who could warrant imprisonment or death in a signed letter under his seal