regaining vs acquisition

regaining and acquisition both are nouns.

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

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

regaining: getting something back again
acquisition: the act of contracting or assuming or acquiring possession of something

regaining (noun)	acquisition (noun)
getting something back again	the act of contracting or assuming or acquiring possession of something
	an ability that has been acquired by training
	the cognitive process of acquiring skill or knowledge
	something acquired