heel i think
heelsolelacetoesSoleHeelVampSoleHeelVamp
lace
the answer is palm
Coat, sock, shoe, robe...
The words appear to be organized based on the number of letters they contain. Each word has a different number of letters: "gun" (3), "shoe" (4), "spree" (5), "door" (4), "hive" (4), "kicks" (5), "heaven" (6), "gate" (4), "line" (4), and "den" (3). If sorted by the number of letters, the order would be: gun, den (3 letters), shoe, door, hive, gate, line (4 letters), spree, kicks (5 letters), heaven (6 letters).
Only 1 part has 4 letters, noch, the notched part for the string.
sock, shoe, coat are 3 that come to mind.
The answer is brim.
sole heel lace
base
i think it is your palm
A role maybe?