Undefeatability is a synonym of invulnerability.
As nouns the difference between invulnerability and undefeatability
is that invulnerability is the state of being invulnerable while undefeatability is the quality of being undefeatable; undefeatableness.
invulnerability
English
Noun
(head)
The state of being invulnerable.
References
*
*
undefeatability
English
Noun
(-)
The quality of being undefeatable; undefeatableness.
Synonyms
*unbeatability
*unbeatableness
*undefeatableness (rare)
*invincibility
*invulnerability
*impregnability