Cathay vs Sino-Tibetan

Cathay and Sino-Tibetan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cathay	Yes	No	No	No
Sino-Tibetan	Yes	No	No	No

Cathay (noun)	Sino-Tibetan (noun)
a communist nation that covers a vast territory in eastern Asia; the most populous country in the world	the family of tonal languages spoken in eastern Asia