Hondo vs Honshu

Hondo and Honshu both are nouns.

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

As nouns, Hondo and Honshu are synonyms defined as:

Hondo and Honshu: 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

Hondo (noun)	Honshu (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