substantiate
verb
[ səbˈstanʃɪeɪt ]
• provide evidence to support or prove the truth of.
• "they had found nothing to substantiate the allegations"
Similar:
prove,
give proof of,
show to be true,
give substance to,
support,
uphold,
back up,
bear out,
justify,
vindicate,
validate,
corroborate,
verify,
authenticate,
confirm,
endorse,
give credence to,
lend weight to,
establish,
demonstrate,
vouch for,
attest to,
testify to,
stand by,
bear witness to,
Origin:
mid 17th century: from medieval Latin substantiat- ‘given substance’, from the verb substantiare .