retentivity vs acquisitiveness

retentivity and acquisitiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
retentivity	Yes	No	No	No
acquisitiveness	Yes	No	No	No

As nouns, acquisitiveness is a hypernym of retentivity; that is, acquisitiveness is a word with a broader meaning than retentivity:

retentivity (noun)	acquisitiveness (noun)
the power of retaining liquid	strong desire to acquire and possess
the property of retaining possessions that have been acquired
the power of retaining and recalling past experience