Great Sandy Desert vs Dahna

Great Sandy Desert and Dahna both are nouns.

Word	Noun	Adjective	Verb	Adverb
Great Sandy Desert	Yes	No	No	No
Dahna	Yes	No	No	No

As nouns, Great Sandy Desert and Dahna are synonyms defined as:

Other synonyms of Great Sandy Desert include Ad-Dahna Desert, Ar Rimsal, Rub al-Khali.

Great Sandy Desert (noun)	Dahna (noun)
a desert region in northwestern Australia to the north of the Gibson Desert	a desert in southern Saudi Arabia
a desert in southern Saudi Arabia