bloodletting

As a noun bloodletting is

the archaic practice of treating illness by removing some blood, believed to be tainted, from the stricken person.

As nouns the difference between bloodshedding and bloodletting

is that bloodshedding is the act of shedding blood while bloodletting is the archaic practice of treating illness by removing some blood, believed to be tainted, from the stricken person.

As nouns the difference between taxonomy and bloodletting

is that taxonomy is the science or the technique used to make a classification while bloodletting is the archaic practice of treating illness by removing some blood, believed to be tainted, from the stricken person.

As nouns the difference between bloodletting and bloodletter

is that bloodletting is the archaic practice of treating illness by removing some blood, believed to be tainted, from the stricken person while bloodletter is one who performs bloodletting (the removal of blood in the hope of curing illness).