recollection vs retentiveness

recollection and retentiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
recollection	Yes	No	No	No
retentiveness	Yes	No	No	No

As nouns, retentiveness is a hypernym of recollection; that is, retentiveness is a word with a broader meaning than recollection:

Other hypernyms of recollection include memory, retention, retentivity.

recollection (noun)	retentiveness (noun)
the ability to recall past occurrences	the property of retaining possessions that have been acquired
the process of remembering (especially the process of recovering information by mental effort)	the power of retaining liquid
something recalled to the mind	the power of retaining and recalling past experience