acknowledgment vs annotation

acknowledgment and annotation both are nouns.

Word	Noun	Adjective	Verb	Adverb
acknowledgment	Yes	No	No	No
annotation	Yes	No	No	No

As nouns, annotation is a hypernym of acknowledgment; that is, annotation is a word with a broader meaning than acknowledgment:

acknowledgment: a short note recognizing a source of information or of a quoted passage
annotation: a comment or instruction (usually added)

Other hypernyms of acknowledgment include notation, note.

acknowledgment (noun)	annotation (noun)
a statement acknowledging something or someone	the act of adding notes
a short note recognizing a source of information or of a quoted passage	a comment or instruction (usually added)
the state or quality of being recognized or acknowledged