theology vs theological system

theology and theological system both are nouns.

Word	Noun	Adjective	Verb	Adverb
theology	Yes	No	No	No
theological system	Yes	No	No	No

As nouns, theology and theological system are synonyms defined as:

theology and theological system: a particular system or school of religious beliefs and teachings

theology (noun)	theological system (noun)
the learned profession acquired by specialized courses in religion (usually taught at a college or seminary)	a particular system or school of religious beliefs and teachings
a particular system or school of religious beliefs and teachings
the rational and systematic study of religion and its influences and of the nature of religious truth