retentiveness vs retention

retentiveness and retention both are nouns.

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

As nouns, retentiveness and retention are synonyms defined as:

Other synonyms of retentiveness include retentivity.

As nouns, retentiveness and retention are synonyms defined as:

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

Other synonyms of retentiveness include memory, retentivity.

retentiveness (noun)	retention (noun)
the property of retaining possessions that have been acquired	the act of retaining something
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