apology vs acknowledgement

apology and acknowledgement both are nouns.

Word	Noun	Adjective	Verb	Adverb
apology	Yes	No	No	No
acknowledgement	Yes	No	No	No

As nouns, acknowledgement is a hypernym of apology; that is, acknowledgement is a word with a broader meaning than apology:

Other hypernyms of apology include acknowledgment.

apology (noun)	acknowledgement (noun)
a poor example	a statement acknowledging something or someone
an expression of regret at having caused trouble for someone	the state or quality of being recognized or acknowledged
a formal written defense of something you believe in strongly