senselessness vs mindlessness

senselessness and mindlessness both are nouns.

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

As nouns, senselessness and mindlessness are synonyms defined as:

Other synonyms of senselessness include inanity, pointlessness, vacuity.

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