cowardly (adj.)

• abulic
• afraid
• anemic
• asthenic
• bashful
• bloodless
• caitiff
• chicken
• chickenhearted
• craven
• dastardly
• daunted
• debilitated
• diffident
• dismayed
• drooping
• droopy
• dull
• effete
• etiolated
• faint
• fainthearted
• fearful
• fearing
• fearsome
• feeble
• feebleminded
• flabby
• flaccid
• floppy
• frail
• frightened
• funky
• gone
• goosy
• gutless
• imbecile
• impotent
• infirm
• intimidated
• invertebrate
• jumpy
• languid
• languorous
• lily-livered
• limber
• limp
• listless
• mousy
• namby-pamby
• nerveless
• nervous
• panicky
• pliable
• poltroon
• powerless
• pusillanimous
• recreant
• rubbery
• sapless
• scared
• scary
• shaky
• shivery
• shrinking
• shy
• sissified
• sissy
• skittish
• slack
• soft
• spineless
• timid
• timorous
• trembling
• tremulous
• trigger-happy
• unhardened
• unmanly
• unmanned
• unnerved
• unstrung
• vile
• weak
• weak-kneed
• weakly
• white-livered
• worthless
• yellow