corroborate vs. collaborate

corroborate

[kuh-rob-uh-reyt, kuh-rob-er-it] / kəˈrɒb əˌreɪt, kəˈrɒb ər ɪt /

verb (used with object)

corroborated, corroborating

collaborate

[kuh-lab-uh-reyt] / kəˈlæb əˌreɪt /

collaborated, collaborating

to work, one with another; cooperate, as on a literary work.

They collaborated on a novel.
to cooperate with an enemy nation, especially with an enemy occupying one's country.

He collaborated with the Nazis during World War II.

Synonyms:

abet, assist, join, collude