Synonyms and related words :
Milquetoast, Scaramouch, baby, big baby, caitiff, chicken, chicken liver, craven, dastard, fraid-cat, fraidy-cat, funk, funker, gutless, invertebrate, jellyfish, lily liver, lily-livered, milksop, mouse, poltroon, poltroonish, pusillanimous, quitter, recreant, scaredy-cat, sissy, spunkless, unmanly, weak sister, weakling, white feather, white liver