self-abasement vs self-mortification

self-abasement and self-mortification both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-abasement	Yes	No	No	No
self-mortification	Yes	No	No	No

As nouns, self-abasement and self-mortification are synonyms defined as:

self-abasement and self-mortification: voluntary self-punishment in order to atone for some wrongdoing

Other synonyms of self-abasement include penance.

self-abasement (noun)	self-mortification (noun)
voluntary self-punishment in order to atone for some wrongdoing	voluntary self-punishment in order to atone for some wrongdoing