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tr.v. sub·stan·ti·at·ed, sub·stan·ti·at·ing, sub·stan·ti·ates
1. To prove the truth of or support with proof or evidence: substantiate an accusation. See Synonyms at confirm.
2. To give substance to; make real or actual.

[New Latin substantiāre, substantiāt-, from Latin substantia, substance; see substance.]

sub·stan′ti·a′tion n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.substantiating - serving to support or corroborate; "collateral evidence"
supportive - furnishing support or assistance; "a supportive family network"; "his family was supportive of his attempts to be a writer"