Ezo vs Hokkaido

Ezo and Hokkaido both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ezo	Yes	No	No	No
Hokkaido	Yes	No	No	No

As nouns, Ezo and Hokkaido are synonyms defined as:

Ezo and Hokkaido: the second largest of the four main islands of Japan; to the north of Honshu

Other synonyms of Ezo include Yezo.

Ezo (noun)	Hokkaido (noun)
the second largest of the four main islands of Japan; to the north of Honshu	the second largest of the four main islands of Japan; to the north of Honshu