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