cicatrix

As nouns the difference between bruise and cicatrix

is that bruise is (medicine) a purplish mark on the skin due to leakage of blood from capillaries under the surface that have been damaged by a blow while cicatrix is a scar that remains after the development of new tissue over a recovering wound or sore (also used figuratively).

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 nouns the difference between cicatrix and imperfection

is that cicatrix is a scar that remains after the development of new tissue over a recovering wound or sore (also used figuratively) while imperfection is (uncountable) those qualities or features that are imperfect; the characteristic, state, or quality of being imperfect.