comfy vs cosy

comfy is not a noun while cosy is a noun.

Word	Noun	Adjective	Verb	Adverb
comfy	No	Yes	No	No
cosy	Yes	Yes	No	No

comfy (noun)	cosy (noun)
	a padded cloth covering to keep a teapot warm

comfy (adjective)	cosy (adjective)
providing or experiencing physical well-being or relief (`comfy' is informal)	enjoying or affording comforting warmth and shelter especially in a small space
	suggesting connivance
	having or fostering a warm or friendly and informal atmosphere