exhibitor vs exhibitioner

exhibitor and exhibitioner both are nouns.

Word	Noun	Adjective	Verb	Adverb
exhibitor	Yes	No	No	No
exhibitioner	Yes	No	No	No

As nouns, exhibitor and exhibitioner are synonyms defined as:

exhibitor and exhibitioner: someone who organizes an exhibit for others to see

Other synonyms of exhibitor include shower.

exhibitor (noun)	exhibitioner (noun)
someone who organizes an exhibit for others to see	someone who organizes an exhibit for others to see