Jylland vs Jutland

Jylland and Jutland both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jylland	Yes	No	No	No
Jutland	Yes	No	No	No

As nouns, Jylland and Jutland are synonyms defined as:

Jylland and Jutland: peninsula in northern Europe that forms the continental part of Denmark and a northern part of Germany

Jylland (noun)	Jutland (noun)
peninsula in northern Europe that forms the continental part of Denmark and a northern part of Germany	an indecisive naval battle in World War I (1916); fought between the British and German fleets off the northwestern coast of Denmark
	peninsula in northern Europe that forms the continental part of Denmark and a northern part of Germany