blessing vs approval

blessing and approval both are nouns.

Word	Noun	Adjective	Verb	Adverb
blessing	Yes	No	No	No
approval	Yes	No	No	No

As nouns, blessing and approval are synonyms defined as:

Other synonyms of blessing include approving.

blessing (noun)	approval (noun)
the act of praying for divine protection	the formal act of approving
the formal act of approving	a message expressing a favorable opinion
a ceremonial prayer invoking divine protection	a feeling of liking something or someone good
a short prayer of thanks before a meal	acceptance as satisfactory
a desirable state