Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
scrupulous [ˈskruːpjuləs] adj (painstaking) тща́тельный*тща́телен , скрупулёзный*скрупулёзен (fair-minded) щепети́льный*щепети́лен
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: