acquisition vs purchase

acquisition and purchase both are nouns.

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

As nouns, purchase is a hyponym of acquisition; that is, purchase is a word with a more specific, narrower meaning than acquisition:

acquisition: the act of contracting or assuming or acquiring possession of something
purchase: the acquisition of something for payment

As nouns, purchase is a hyponym of acquisition; that is, purchase is a word with a more specific, narrower meaning than acquisition:

Other hyponyms of acquisition include accession, addition, gift.

acquisition (noun)	purchase (noun)
the act of contracting or assuming or acquiring possession of something	the acquisition of something for payment
an ability that has been acquired by training	the mechanical advantage gained by being in a position to use a lever
the cognitive process of acquiring skill or knowledge	a means of exerting influence or gaining advantage
something acquired	something acquired by purchase

acquisition (verb)	purchase (verb)
	obtain by purchase; acquire by means of a financial transaction