inanity vs senselessness

inanity and senselessness both are nouns.

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

As nouns, inanity and senselessness are synonyms defined as:

Other synonyms of inanity include mindlessness, pointlessness, vacuity.

inanity (noun)	senselessness (noun)
total lack of meaning or ideas	total lack of meaning or ideas