Phase behavior and dielectric relaxation of camphor and borneol enantiomers in neat phase and their binary mixtures have been studied employing dielectric spectroscopy (20 Hz-2 MHz), differential scanning calorimetry (DSC), and X-ray diffraction techniques. Camphor and borneol form a solid solution in phase S-1 which is an orientationally disordered phase of fcc structure and gets supercooled during cooling. For solid solutions, two a processes and a sub-T-g process are observed. The f(m) values of primary relaxation processes are deviating from Arrhenius behavior. The activation energy of sub-T-g process lies in the range of 11-18 kJ/mol and is of Johari-Goldstein type indicating the intermolecular nature. Sub- T-g process is perhaps the dominant process seen at higher temperatures studied by Smyth et al. (1963) and Davies et al. (1962).