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Unsubstantiated vs Unfounded - What's the difference?

unsubstantiated | unfounded |

As adjectives the difference between unsubstantiated and unfounded

is that unsubstantiated is lacking substantiation; without evidence while unfounded is having no strong foundation; not based on solid reasons or facts.

unsubstantiated

English

Adjective

(en adjective)
  • Lacking substantiation; without evidence.

    • unfounded

    English

    Adjective

    (-)
  • Having no strong foundation; not based on solid reasons or facts.
  • Not having been founded or instituted.
  • * 1980 , Helen Louise Gardner, ?John Carey, English Renaissance studies (page 268)
    • Even the great world as yet undiscovered, the cities as yet unfounded , and the history as yet unwritten, are lost: fallen from the beginning.

    Synonyms

    * (not based on solid reasons or facts) baseless, groundless, ungrounded