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Synonyms
cor·rob·o·rate (kə-rŏb́ə-rāt́)

[Latin corrōborāre, corrōborāt-, com-, com-, + rōborāre, to strengthen (from rōbur, rōbor-, strength; see reudh-).]

transitive verb: -rat·ed, -rat·ing, -rates. 

To strengthen or support with other evidence; make more certain. See synonyms at confirm

derivatives

cor·rob́o·rátion
noun
cor·rob́o·rátive
adjective
cor·rob́o·rátor
noun