Yucatan Peninsula vs Yucatan

Yucatan Peninsula and Yucatan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Yucatan Peninsula	Yes	No	No	No
Yucatan	Yes	No	No	No

As nouns, Yucatan Peninsula and Yucatan are synonyms defined as:

Yucatan Peninsula and Yucatan: a peninsula in Central America extending into the Gulf of Mexico between the Bay of Campeche and the Caribbean Sea

Yucatan Peninsula (noun)	Yucatan (noun)
a peninsula in Central America extending into the Gulf of Mexico between the Bay of Campeche and the Caribbean Sea	a peninsula in Central America extending into the Gulf of Mexico between the Bay of Campeche and the Caribbean Sea
	a state of Mexico on the northern part of the Yucatan Peninsula