As the Shakti (female energy) of Shiva, she has two aspects, the mild one and the fierce one. In her milder form she is Uma, Gauri, Parvati, Haimavati, Jaganmata and Bhavani. In her terrible aspect she is Durga, Kali, Chandi and Bhairavi. See : Durga and Bhavani (Ad Bhavani).
References :
1. Kohli,Surindar Singh ed,Dictionary of Mythological References in Guru Granth Sahib 1993