guts

abdomen audacity audacity authority backbone bite bowels braveness bravado bravery contents continuance courageousness courage daring dauntlessness defiance determination doughtiness drive drives durability endurance entrail entrails essential fearlessness fillings filling/filler fillers force foundation foundations fundamental gall gameness get-up-and-go ginger grit gutsiness hardihood heart incisiveness indocility innards insides intractableness intestines intractability intrepidity intestinal fortitude intrepidness mettle meat and potatoes moxie nerviness nerve overconfidence patience perseverance pertness pluckiness pluck presumptuousness prowess push pushes pushiness recalcitrance recalcitrancy resolution resolutions right stuff rudiments sassiness sauciness say-so spice spirit spunkiness spunk stamina staying power stoutheartedness strengths strength substance substances tang tenacity tolerance tolerance undauntedness uppishness uppityness valiance valor valiantness venturesomeness venturousness viscera viscera vitality vivaciousness zest zest