anamnesis vs retentivity

anamnesis and retentivity both are nouns.

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

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

Other hypernyms of anamnesis include memory, retention, retentiveness.

anamnesis (noun)	retentivity (noun)
the ability to recall past occurrences	the power of retaining liquid
the case history of a medical patient as recalled by the patient	the property of retaining possessions that have been acquired
	the power of retaining and recalling past experience