Kuan Yin vs Kwan-yin

Kuan Yin and Kwan-yin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kuan Yin	Yes	No	No	No
Kwan-yin	Yes	No	No	No

As nouns, Kuan Yin and Kwan-yin are synonyms defined as:

Kuan Yin and Kwan-yin: (Buddhism) a female Bodhisattva; often called the Goddess of Mercy and considered an aspect of the Bodhisattva Avalokiteśvara; identified with Japanese Kwannon

Other synonyms of Kuan Yin include Guanyin.

Kuan Yin (noun)	Kwan-yin (noun)
(Buddhism) a female Bodhisattva; often called the Goddess of Mercy and considered an aspect of the Bodhisattva Avalokiteśvara; identified with Japanese Kwannon	(Buddhism) a female Bodhisattva; often called the Goddess of Mercy and considered an aspect of the Bodhisattva Avalokiteśvara; identified with Japanese Kwannon