Uighur vs Uygur language

Uighur and Uygur language both are nouns.

Word	Noun	Adjective	Verb	Adverb
Uighur	Yes	No	No	No
Uygur language	Yes	No	No	No

As nouns, Uighur and Uygur language are synonyms defined as:

Uighur and Uygur language: the Turkic language spoken by approximately 7,000,000 Uighur in extreme northwestern China

Other synonyms of Uighur include Uighur language, Uigur, Uigur language, Uygur.

Uighur (noun)	Uygur language (noun)
the Turkic language spoken by approximately 7,000,000 Uighur in extreme northwestern China	the Turkic language spoken by approximately 7,000,000 Uighur in extreme northwestern China
the script (derived from Aramaic) used to write the Uighur language
a member of a people who speak Uighur and live in Xinjiang and adjacent areas