lividity

As nouns the difference between bruise and lividity

is that bruise is a purplish mark on the skin due to leakage of blood from capillaries under the surface that have been damaged by a blow while lividity is the state or quality of being livid.

As a verb bruise

is to strike (a person), originally with something flat or heavy, but now specifically in such a way as to discolour the skin without breaking it.

As an adjective livid

is livid.

As a noun lividity is

(label) the state or quality of being livid.

Lividness is a synonym of lividity.

As nouns the difference between lividity and lividness

is that lividity is the state or quality of being livid while lividness is the state or condition of being livid (dark or pallid).