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Unassailable vs Undoubtable - What's the difference?

unassailable | undoubtable |

As adjectives the difference between unassailable and undoubtable

is that unassailable is secure against attack; impregnable while undoubtable is incapable of being doubted; indubitable.

unassailable

English

Adjective

(-)
  • secure against attack; impregnable
  • (by extension) undeniable, incontestable or incontrovertible
    • She won the debate with her unassailable logic.

    undoubtable

    English

    Adjective

    (-)
  • (rare) Incapable of being doubted; indubitable.
  • *1904 , , The Island Pharisees , ch. 20,
  • *:Her undoubtable quality had a non-individual flavour, as if standing for her class.

    • Derived terms

    *undoubtably

    References

    * * *Oxford English Dictionary , 2nd ed., 1989.