good example vs exemplar

good example and exemplar both are nouns.

Word	Noun	Adjective	Verb	Adverb
good example	Yes	No	No	No
exemplar	Yes	No	No	No

As nouns, good example and exemplar are synonyms defined as:

Other synonyms of good example include example, model.

good example (noun)	exemplar (noun)
something to be imitated	something to be imitated