Spineless and Sissy

Spineless adjective - Lacking strength of will or character.

Sissy and spineless are semantically related in wimpish topic. In some cases you can use "Sissy" instead an adjective "Spineless". informal substitute

Sissy adjective - Of or relating to a man who has or displays qualities more suitable for women.

Spineless and sissy are semantically related in cowardly topic. Sometimes you can use "Spineless" instead an adjective "Sissy".