cosy vs comfortable

cosy is a noun but comfortable is not a noun.

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

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

cosy (adjective)	comfortable (adjective)
enjoying or affording comforting warmth and shelter especially in a small space	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
having or fostering a warm or friendly and informal atmosphere	in fortunate circumstances financially; moderately rich
	sufficient to provide comfort
	having a wide margin