Kwan-yin vs Kuan Yin

Kwan-yin and Kuan Yin both are nouns.

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

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

Kwan-yin and Kuan 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 Kwan-yin include Guanyin.

Kwan-yin (noun)	Kuan 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