S is about

Smash is about mash

We smash potatoes into mashed potatoes 

Send is to reach the other end

We send mails to the other end of the world 

Skill is the technique to kill 

We hone our skill to kill for survival 

Story is a tale of tory,

A bird that arouse our imagination

P.S. Tory means bird, such as the name of a Japanese cartoon artist, Toriyama, which means bird mountain.