Cebuano vs Cebuan

Cebuano and Cebuan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cebuano	Yes	No	No	No
Cebuan	Yes	No	No	No

As nouns, Cebuano and Cebuan are synonyms defined as:

Cebuano and Cebuan: language of the people of Cebu in the Philippines; its lexicon contributes to the official language of the Philippines

Other synonyms of Cebuano include Cebuan language, Cebuano language.

Cebuano (noun)	Cebuan (noun)
language of the people of Cebu in the Philippines; its lexicon contributes to the official language of the Philippines	language of the people of Cebu in the Philippines; its lexicon contributes to the official language of the Philippines
	inhabitant of the island of Cebu; a member of the Visayan people of the Philippines