vulnerable (adj.)

• assailable
• attackable
• beatable
• breakable
• brittle
• conquerable
• crisp
• crispy
• crumbly
• defenseless
• delicate
• expugnable
• fatherless
• fissile
• flimsy
• fragile
• frail
• frangible
• friable
• friendless
• helpless
• motherless
• penetrable
• pregnable
• shivery
• splintery
• surmountable
• unprotected
• untenable
• vincible
• weak