German vs Bavarian

German and Bavarian both are nouns.

Word	Noun	Adjective	Verb	Adverb
German	Yes	Yes	No	No
Bavarian	Yes	Yes	No	No

As nouns, Bavarian is a hyponym of German; that is, Bavarian is a word with a more specific, narrower meaning than German:

Other hyponyms of German include Teuton, East German, Boche, Hun, Jerry, Kraut, Krauthead, Berliner, Prussian.

German (noun)	Bavarian (noun)
the standard German language; developed historically from West Germanic	a native or an inhabitant of Bavaria
a person of German nationality

German (adjective)	Bavarian (adjective)
of or pertaining to or characteristic of Germany or its people or language	of or relating to or characteristic of Bavaria or its people