Hmong language vs Miao

Hmong language and Miao both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hmong language	Yes	No	No	No
Miao	Yes	No	No	No

As nouns, Hmong language and Miao are synonyms defined as:

Hmong language and Miao: a language of uncertain affiliation spoken by the Hmong

Other synonyms of Hmong language include Hmong, Miao language.

Hmong language (noun)	Miao (noun)
a language of uncertain affiliation spoken by the Hmong	a language of uncertain affiliation spoken by the Hmong
	a people living traditionally in mountain villages in southern China and adjacent areas of Vietnam and Laos and Thailand; many have emigrated to the United States