Yezo vs Hokkaido

Yezo and Hokkaido both are nouns.

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

As nouns, Yezo and Hokkaido are synonyms defined as:

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

Other synonyms of Yezo include Ezo.

Yezo (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