a Bump?
The smaller 4 letter word could be "Tiny".
dent
tart
lyre
gnat
teal
bead
One option is baby.
the answer is "TOE HOLD"
A Sloe is a small wild plumb
The 4-letter word starting with "s" that means the highest point is "summit." It refers to the topmost part of a mountain or hill, or can also be used metaphorically to describe the peak of achievement or success.
Fife