substantiate - definition and synonyms

verb [transitive] 

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/səbˈstænʃieɪt/
present tense
I/you/we/theysubstantiate
he/she/itsubstantiates
present participlesubstantiating
past tensesubstantiated
past participlesubstantiated
  1. to provide evidence that proves something

    They were unable to substantiate their claims of government malpractice.

derived word

substantiation

 

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/səbˌstænʃiˈeɪʃ(ə)n/
noun [uncountable]