ultima Thule vs Thule

ultima Thule and Thule both are nouns.

Word	Noun	Adjective	Verb	Adverb
ultima Thule	Yes	No	No	No
Thule	Yes	No	No	No

As nouns, ultima Thule and Thule are synonyms defined as:

ultima Thule and Thule: the geographical region believed by ancient geographers to be the northernmost land in the inhabited world

ultima Thule (noun)	Thule (noun)
the geographical region believed by ancient geographers to be the northernmost land in the inhabited world	the geographical region believed by ancient geographers to be the northernmost land in the inhabited world
	a town in northwestern Greenland; during World War II a United States naval base was built there