base
Only 1 part has 4 letters, noch, the notched part for the string.
You grip something tightly.
The answer is brim.
heelsolelacetoesSoleHeelVampSoleHeelVamp
i think it is your palm
A role maybe?
Base
heel i think
"Nose"
mend
A door is an opening.
Beer has only four letters. Milk, java, soda and wine have only four letters.