Uygur vs Uigur language

Uygur and Uigur language both are nouns.

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

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

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

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

Uygur (noun)	Uigur 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