addition vs acquisition

addition and acquisition both are nouns.

Word	Noun	Adjective	Verb	Adverb
addition	Yes	No	No	No
acquisition	Yes	No	No	No

As nouns, acquisition is a hypernym of addition; that is, acquisition is a word with a broader meaning than addition:

addition (noun)	acquisition (noun)
the arithmetic operation of summing; calculating the sum of two or more numbers	the act of contracting or assuming or acquiring possession of something
the act of adding one thing to another	an ability that has been acquired by training
a component that is added to something to improve it	the cognitive process of acquiring skill or knowledge
a suburban area laid out in streets and lots for a future residential area	something acquired
something added to what you already have
a quantity that is added