inanity vs mindlessness

inanity and mindlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
inanity	Yes	No	No	No
mindlessness	Yes	No	No	No

As nouns, inanity and mindlessness are synonyms defined as:

Other synonyms of inanity include pointlessness, senselessness, vacuity.

inanity (noun)	mindlessness (noun)
total lack of meaning or ideas	the trait of acting rashly and without prudence
	total lack of meaning or ideas