Honshu vs Hondo

Honshu and Hondo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Honshu	Yes	No	No	No
Hondo	Yes	No	No	No

As nouns, Honshu and Hondo are synonyms defined as:

Honshu and Hondo: the central and largest of the four main islands of Japan; between the Sea of Japan and the Pacific Ocean; regarded as the Japanese mainland

Honshu (noun)	Hondo (noun)
the central and largest of the four main islands of Japan; between the Sea of Japan and the Pacific Ocean; regarded as the Japanese mainland	the central and largest of the four main islands of Japan; between the Sea of Japan and the Pacific Ocean; regarded as the Japanese mainland