a person who is under medical care or treatment.

a person or thing that undergoes some action.

Archaic . a sufferer or victim.

bearing provocation, annoyance, misfortune, delay, hardship, pain, etc., with fortitude and calm and without complaint, anger, or the like.

characterized by or expressing such a quality

a patient smile.

quietly and steadily persevering or diligent, esp. in detail or exactness

a patient worker.

undergoing the action of another ( opposed to agent ). ?

patient of

having or showing the capacity for endurance

a man patient of distractions.

susceptible of

This statement is patient of criticism.

adjective

agitated , frustrated , impatient , intolerant , unwilling

noun

doctor

adjective

accommodating , calm , composed , easy-going , enduring , even-tempered , forbearing , forgiving , gentle , imperturbable , indulgent , lenient , long-suffering , meek , mild , mild-tempered , persevering , persistent , philosophic , philosophical , quiet , resigned , self-possessed , serene , stoical , submissive , tolerant , tranquil , uncomplaining , understanding , unruffled , untiring

noun

case , convalescent , emergency , inmate , invalid , outpatient , shut-in , sick person , subject , sufferer , victim , enduring , forgiving , long-suffering , meek , mild , persistent , tireless , understanding