indelibility vs ineffaceability

indelibility and ineffaceability both are nouns.

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

As nouns, indelibility and ineffaceability are synonyms defined as:

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

indelibility (noun)	ineffaceability (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.