annexation vs incorporation

annexation and incorporation both are nouns.

Word	Noun	Adjective	Verb	Adverb
annexation	Yes	No	No	No
incorporation	Yes	No	No	No

As nouns, incorporation is a hypernym of annexation; that is, incorporation is a word with a broader meaning than annexation:

annexation (noun)	incorporation (noun)
the formal act of acquiring something (especially territory) by conquest or occupation	including by incorporating
incorporation by joining or uniting	consolidating two or more things; union in (or into) one body
	learning (of values or attitudes etc.) that is incorporated within yourself