theologist vs theologian

theologist and theologian both are nouns.

Word	Noun	Adjective	Verb	Adverb
theologist	Yes	No	No	No
theologian	Yes	No	No	No

As nouns, theologist and theologian are synonyms defined as:

theologist and theologian: someone who is learned in theology or who speculates about theology

Other synonyms of theologist include theologiser, theologizer.

theologist (noun)	theologian (noun)
someone who is learned in theology or who speculates about theology	someone who is learned in theology or who speculates about theology