The word "brittlenesses" refers to the tendency of something to break or snap easily. Synonyms for this word include fragility, crispiness, delicacy, friability, and frailty. Fragility implies a delicate state that could easily be damaged. Crispiness suggests a state that is easily crumbled or snapped. Delicacy implies a lightness or fineness that could easily break. Friability suggests that something is apt to fall apart or turn to dust. Frailty suggests that something is easily damaged or weak. Overall, these synonyms for brittleness describe a state of vulnerability that could result in damage or breakage with minimal force.