Ad-Dahna Desert vs Rub al-Khali

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

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

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

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

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