Navajo language vs Navaho

Navajo language and Navaho both are nouns.

Word	Noun	Adjective	Verb	Adverb
Navajo language	Yes	No	No	No
Navaho	Yes	No	No	No

As nouns, Navajo language and Navaho are synonyms defined as:

Navajo language and Navaho: the Athapaskan language spoken by the Navaho

Other synonyms of Navajo language include Navaho language, Navajo.

Navajo language (noun)	Navaho (noun)
the Athapaskan language spoken by the Navaho	the Athapaskan language spoken by the Navaho
	a member of an Athapaskan people that migrated to Arizona and New Mexico and Utah