Later, other terms were adopted, like Vajrayana ("Diamond Vehicle" or "Thunderbolt Vehicle").

In Tibetan Buddhism practiced in the Himalayan regions of India, Nepal, Tibet, and Bhutan, Buddhist Tantra is most often termed Vajrayana (Tib. ??????????????, dorje tekpa, Wyl. rdo rje theg pa) and Secret mantra (Skt. Guhyamantra, Tib. ?????????, sang ngak, Wyl. gsang sngags).