annotating vs expansion

annotating and expansion both are nouns.

Word	Noun	Adjective	Verb	Adverb
annotating	Yes	No	No	No
expansion	Yes	No	No	No

As nouns, expansion is a hypernym of annotating; that is, expansion is a word with a broader meaning than annotating:

Other hypernyms of annotating include expanding upon.

annotating (noun)	expansion (noun)
the act of adding notes	the act of increasing (something) in size or volume or quantity or scope
	adding information or detail
	a discussion that provides additional information
	a function expressed as a sum or product of terms