conversion vs psychological medicine

conversion and psychological medicine both are nouns.

Word	Noun	Adjective	Verb	Adverb
conversion	Yes	No	No	No
psychological medicine	Yes	No	No	No

conversion (noun)	psychological medicine (noun)
the act of changing from one use or function or purpose to another	the branch of medicine dealing with the diagnosis and treatment of mental disorders
a spiritual enlightenment causing a person to lead a new life
a successful free throw or try for point after a touchdown
act of exchanging one type of money or security for another
a change in the units or form of an expression:
interchange of subject and predicate of a proposition
an event that results in a transformation
a change of religion
(psychiatry) a defense mechanism represses emotional conflicts which are then converted into physical symptoms that have no organic basis