Rajas  
One of the three gunas characterized by action, energy, passion and stimulation that leads to the life of sensual enjoyment, pleasure and pain, efforts and restlessness.

Rakshasa
It is a synonym for demons or devil beings who are unable to distinguish between right and wrong and their mind is diverted towards conflicts and anger.

Rakta
Literally meaning the blood, it is one of the seven dhatus supported by rasa and is responsible for the nourishment of the permanent dhatus, providing physical strength and color to the body. This circulating blood vessel is considered as the basis of life.

Ram
In Hindu mythology Lord Ram is the seventh incarnation of Vishnu and the warrior hero of the holy Hindu epic, the Ramayana. He is considered as the embodiment of righteousness.

Ranjaka
Located in the stomach, liver and spleen it is one of the five pitta subdoshas. It perform the function of giving color to the lymph when it is transformed into blood as it passes through the liver and spleen.