Aloha in the Hawaiian language means affection, love, peace, compassion, mercy, goodbye and hello, among other sentiments of a similar nature. The word aloha derives from the Hawaiian words also meaning "presence," "front," "face," or "share"; and ha, meaning "breath of life" or "essence of life." In ancient times - and to this day - Hawaiians put their foreheads together and say "alo," and then breathe out say "ha," thus literally facing and exchanging their life's breath.
Namaste in the Indian language means "I honour the place in you in which the entire Universe dwells, I honour the place in you which is of Love, of Truth, of Light and of Peace; when you are in that place in you, and I am in that place in me, we are One."
from http://www.aloha-namaste.com/