I have always pictured Psionicists as being more-or-less Indian in flavour (Hindu ascetics are all about "mind over body" and Concentration, and I have felt some of those powers have distinctly Hindu flavour). Unfortunately, I know very little about Sanskrit, but throwing terms like "Chakra" and "Prana" around are cool.
There's also the issue of Dark Sun, of course (full disclosure: I'm a DS fanboy). In DS there is a lot of psionic jargon (starting with the term "mindbender" for psionicists) which you may feel is more distinct, "better", or both. "The Will and the Way" was the Dark Sun supplement in 2e that described psionicist culture more thoroughly; you may want to look at that. It's certainly integral to the feel of the setting and, believe me, you may accuse Dark Sun of anything except being Sci-Fi'ish.