comfort vs coziness

comfort and coziness both are nouns.

Word	Noun	Adjective	Verb	Adverb
comfort	Yes	No	Yes	No
coziness	Yes	No	No	No

As nouns, coziness is a hyponym of comfort; that is, coziness is a word with a more specific, narrower meaning than comfort:

Other hyponyms of comfort include ease, relief, solace, solacement, cosiness, snugness, convenience.

comfort (noun)	coziness (noun)
the act of consoling; giving relief in affliction	a state of warm snug comfort
assistance, such as that provided to an enemy or to a known criminal
bedding made of two layers of cloth filled with stuffing and stitched together
a feeling of freedom from worry or disappointment
a state of being relaxed and feeling no pain
a freedom from financial difficulty that promotes a comfortable state
satisfaction or physical well-being provided by a person or thing

comfort (verb)	coziness (verb)
lessen pain or discomfort; alleviate
give moral or emotional strength to