retention vs retentiveness

retention and retentiveness both are nouns.

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

As nouns, retention and retentiveness are synonyms defined as:

Other synonyms of retention include retentivity.

As nouns, retention and retentiveness are synonyms defined as:

retention and retentiveness: the power of retaining and recalling past experience

Other synonyms of retention include memory, retentivity.

retention (noun)	retentiveness (noun)
the act of retaining something	the property of retaining possessions that have been acquired
the power of retaining liquid	the power of retaining liquid
the power of retaining and recalling past experience	the power of retaining and recalling past experience