indomitability vs invincibility

indomitability and invincibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
indomitability	Yes	No	No	No
invincibility	Yes	No	No	No

As nouns, indomitability and invincibility are synonyms defined as:

indomitability and invincibility: the property being difficult or impossible to defeat

indomitability (noun)	invincibility (noun)
the property being difficult or impossible to defeat	the property being difficult or impossible to defeat