Rub al-Khali vs Ad-Dahna Desert

Rub al-Khali and Ad-Dahna Desert both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rub al-Khali	Yes	No	No	No
Ad-Dahna Desert	Yes	No	No	No

As nouns, Rub al-Khali and Ad-Dahna Desert are synonyms defined as:

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

Rub al-Khali (noun)	Ad-Dahna Desert (noun)
a desert in southern Saudi Arabia	a desert in southern Saudi Arabia