Katar vs State of Qatar

Katar and State of Qatar both are nouns.

Word	Noun	Adjective	Verb	Adverb
Katar	Yes	No	No	No
State of Qatar	Yes	No	No	No

As nouns, Katar and State of Qatar are synonyms defined as:

Katar and State of Qatar: an Arab country on the peninsula of Qatar; achieved independence from the United Kingdom in 1971; the economy is dominated by oil

Other synonyms of Katar include Qatar, State of Katar.

Katar (noun)	State of Qatar (noun)
an Arab country on the peninsula of Qatar; achieved independence from the United Kingdom in 1971; the economy is dominated by oil	an Arab country on the peninsula of Qatar; achieved independence from the United Kingdom in 1971; the economy is dominated by oil
a peninsula extending northward from the Arabian mainland into the Persian Gulf