Korean Peninsula vs Dae-Han-Min-Gook

Korean Peninsula and Dae-Han-Min-Gook both are nouns.

Word	Noun	Adjective	Verb	Adverb
Korean Peninsula	Yes	No	No	No
Dae-Han-Min-Gook	Yes	No	No	No

As nouns, Korean Peninsula and Dae-Han-Min-Gook are synonyms defined as:

Korean Peninsula and Dae-Han-Min-Gook: an Asian peninsula (off Manchuria) separating the Yellow Sea and the Sea of Japan; the Korean name is Dae-Han-Min-Gook or Han-Gook

Other synonyms of Korean Peninsula include Han-Gook, Korea.

Korean Peninsula (noun)	Dae-Han-Min-Gook (noun)
an Asian peninsula (off Manchuria) separating the Yellow Sea and the Sea of Japan; the Korean name is Dae-Han-Min-Gook or Han-Gook	an Asian peninsula (off Manchuria) separating the Yellow Sea and the Sea of Japan; the Korean name is Dae-Han-Min-Gook or Han-Gook