acceptance vs approval

acceptance and approval both are nouns.

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

As nouns, approval is a hypernym of acceptance; that is, approval is a word with a broader meaning than acceptance:

Other hypernyms of acceptance include approving, blessing.

As nouns, approval is a hyponym of acceptance; that is, approval is a word with a more specific, narrower meaning than acceptance:

acceptance (noun)	approval (noun)
the act of accepting with approval; favorable reception	the formal act of approving
the act of taking something that is offered	a message expressing a favorable opinion
a disposition to tolerate or accept people or situations	a feeling of liking something or someone good
the mental attitude that something is believable and should be accepted as true	acceptance as satisfactory
(contract law) words signifying consent to the terms of an offer (thereby creating a contract)
a time draft drawn on and accepted by a bank
the state of being acceptable and accepted