ineffaceability vs indelibility

ineffaceability and indelibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
ineffaceability	Yes	No	No	No
indelibility	Yes	No	No	No

As nouns, ineffaceability and indelibility are synonyms defined as:

ineffaceability and indelibility: The quality of being difficult to delete, remove, wash away, blot out, or efface.

ineffaceability (noun)	indelibility (noun)
The quality of being difficult to delete, remove, wash away, blot out, or efface.	The quality of being difficult to delete, remove, wash away, blot out, or efface.