retentivity vs module

retentivity and module both are nouns.

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

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

Other hypernyms of retentivity include faculty, mental faculty.

retentivity (noun)	module (noun)
the power of retaining liquid	a self-contained component (unit or item) that is used in combination with other components
the property of retaining possessions that have been acquired	computer circuit consisting of an assembly of electronic components (as of computer hardware)
the power of retaining and recalling past experience	detachable compartment of a spacecraft
	one of the inherent cognitive or perceptual powers of the mind