unconquerable
invincible
Invincible is an adjective.
supreme, all-powerful, enormous, omnipotent, invincible, massive, etc.
The Latin translation of 'invincible' is 'invictus'.
The root word for "invincible" is "vincere," which is Latin for "to conquer" or "to win."
Unconquerable or Invincible.
The invincible hero killed the gang of villians.
The prefix "in" could be used with the word "vincible" to make it "invincible."
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Muteki
"Alternate word" is a noun-phrase that is kind of a synonym for the word "synonym. There is no one exact word that means the same as synonym.