col·lab·o·rate vs corroborate found by google search

cor·rob·o·rate

/kəˈräbəˌrāt/

verb

verb: corroborate; 3rd person present: corroborates; past tense: corroborated; past participle: corroborated; gerund or present participle: corroborating

1. confirm or give support to (a statement, theory, or finding).

   "the witness had corroborated the boy's account of the attack"

   synonyms:

   confirm, verify, endorse, ratify, authenticate, validate, certify; More

col·lab·o·rate

/kəˈlabəˌrāt/

verb

verb: collaborate; 3rd person present: collaborates; past tense: collaborated; past participle: collaborated; gerund or present participle: collaborating

1. work jointly on an activity, especially to produce or create something.

   "he collaborated with a distinguished painter on the designs"

   synonyms:

   cooperate, join (up), join forces, team up, get together, come together, band together, work together, work jointly, participate, unite, combine, merge, link, ally, associate, amalgamate, integrate, form an alliance, pool resources, club together "India has collaborated with several nations on space projects"

   • cooperate traitorously with an enemy.

     "the indigenous elite who collaborated with the colonizers"

     synonyms:

     fraternize, conspire, collude, cooperate, consort, sympathize "they were suspected of having collaborated with the enemy"

     antonyms:

     resist