proof

[1]

proofread

[1]	cogent evidence , evidence , verification , corroboration , confirmation , validation , authentication , ratification , substantiation , documentation , document , facts , data , certification , testimony , (Colloq) ammunition
[2]	test , trial , measure , standard , touchstone , criterion
[3]	test copy , trial impression
[4]	validation , substantiation

adj.

[1]	impervious , impenetrable , able to withstand/resist , protective , strong , tough , impregnable , resistant , tempered