forgetful vs unretentive

forgetful and unretentive both are adjectives.

Word	Noun	Adjective	Verb	Adverb
forgetful	No	Yes	No	No
unretentive	No	Yes	No	No

As adjectives, forgetful and unretentive are synonyms defined as:

forgetful and unretentive: (of memory) deficient in retentiveness or range

Other synonyms of forgetful include short.

forgetful (adjective)	unretentive (adjective)
(of memory) deficient in retentiveness or range	(of memory) deficient in retentiveness or range
not mindful or attentive
failing to keep in mind