religion vs organized religion

religion and organized religion both are nouns.

Word	Noun	Adjective	Verb	Adverb
religion	Yes	No	No	No
organized religion	Yes	No	No	No

As nouns, religion and organized religion are synonyms defined as:

religion and organized religion: an institution to express belief in a divine power

Other synonyms of religion include faith.

religion (noun)	organized religion (noun)
a strong belief in a supernatural power or powers that control human destiny	an institution to express belief in a divine power
an institution to express belief in a divine power