Saturn,
Star,
Shuttle,
Satellite, Saturn, space station, stars, sun and Sputnik spacecraft (Russian) are space words. They begin with the letter s.
Satellites, Saturn, space station, stars and sun are outer space words. They begin with the letter s.
schist and serpentite is all that I can think of.
Some three letter words starting with "s" are:sacsadsagsapsatsawsayseaseesetsewsexsheshysinsipsirsitsixslysobsodsonsopsotsowsoyspaspystysuesumsun
star
Saturn
Some four letter words starting with S and ending with F are:selfserfsurf
Yourself, yours :))
sacramentsscarecrowssegregatesshrewdnesssimplifiessleevelesssmoothnesssnowflakessociopathsspeechlesssquarenessstimulatessubscribes
Sharp, sincere, skillful, smart, special, stylish and sympathetic are positive words. They begin with the letter s.
There is not a SINGLE word in the English words starting with 'z' that are related to the topic energy Lynn605's answer: actually yes there is zen its religious meditation using spiritual energy
Sitting In the main verbs are 'doing' or 'expressing', words: Sit, stand, smile etc