apathy vs spiritlessness

apathy and spiritlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
apathy	Yes	No	No	No
spiritlessness	Yes	No	No	No

As nouns, apathy and spiritlessness are synonyms defined as:

apathy and spiritlessness: the trait of lacking enthusiasm for or interest in things generally

Other synonyms of apathy include indifference, numbness.

apathy (noun)	spiritlessness (noun)
the trait of lacking enthusiasm for or interest in things generally	the trait of lacking enthusiasm for or interest in things generally
an absence of emotion or enthusiasm