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