My thesaurus lists stick or stab. The noun "lance" is related to spear.
Substitute.
The first word beginning with 's' in most dictionaries is usually "sad."
nervous
single, stairway, singer, safety, safely, secure, storage, spitting, sunny, someone, simple
"Sonorous" is a synonym for noisy that starts with the letter "s".
slice, slash
Another word for opportunity which begins with 'S' is scope.
synopsis
Substitute.
Side-Street
softening
sojourn
spousal
Sort or Savor
stole
source spring square
The word "census" has the "s" sound at the beginning and end, but not in the middle. In contrast, "established" has the "s" sound in the middle but not at the beginning or end. Therefore, neither word meets the criteria of having an "s" sound at the beginning, middle, and end.