Oktoberfest vs Octoberfest

Oktoberfest and Octoberfest both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oktoberfest	Yes	No	No	No
Octoberfest	Yes	No	No	No

As nouns, Oktoberfest and Octoberfest are synonyms defined as:

Oktoberfest and Octoberfest: a strong lager made originally in Germany for the Oktoberfest celebration; sweet and copper-colored

Oktoberfest (noun)	Octoberfest (noun)
an autumn festival that involves merrymaking and drinking beer	a strong lager made originally in Germany for the Oktoberfest celebration; sweet and copper-colored
a strong lager made originally in Germany for the Oktoberfest celebration; sweet and copper-colored