comfortable vs cozy

comfortable is not a noun while cozy is a noun.

Word	Noun	Adjective	Verb	Adverb
comfortable	No	Yes	No	No
cozy	Yes	Yes	No	No

comfortable (noun)	cozy (noun)
	a padded cloth covering to keep a teapot warm

comfortable (adjective)	cozy (adjective)
providing or experiencing physical well-being or relief (`comfy' is informal)	suggesting connivance
free from stress or conducive to mental ease; having or affording peace of mind	enjoying or affording comforting warmth and shelter especially in a small space
in fortunate circumstances financially; moderately rich	having or fostering a warm or friendly and informal atmosphere
sufficient to provide comfort
having a wide margin