Stotra

Holy hymn; These hymns praise aspects of the divine, such as Devi, Shiva, or Srivishnu

Shudra

The class that performs manual / physical work

Shraddha

Ritual performed on the death anniversary according to Hindu Almanac, to appease departed ancestors? subtle bodies

Shlokas

Specifically denotes a metered and often rhymed poetic verse or phrase. Shlokas are usually part of stotras which are prayers to the Deities.

seva

Service unto the Absolute Truth, that is, God Principle

Satyayug

The first in the cycle of four eras since the origin of the Universe

Sattvik

Sattva predominant (Sattva is one of the three components in the Universe, which signifies purity and knowledge)