The term 'sock' can refer to a variety of things, including a type of clothing item. In this case, the crossword solutions are all related to the verb form of the word, which means to HIT or STRIKE something. The solutions include WALLOP (6 letters), whap (4 letters), STRIKE (6 letters), PUNCH (5 letters), BOP (3 letters), HIT (3 letters), HOP (3 letters), LAM (3 letters), BASH (4 letters), SLUG (4 letters), tabi (4 letters), and whoop (4 letters). All of these words refer to different types of hitting or striking, ranging from a light tap to a hard blow.