Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
candidate [ˈkændɪdeɪt] n (for job) претенде́нт; (in exam) экзамену́емый[-ая] m(f) adj ; (POL) кандида́т
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.