casserole vs cocotte

casserole and cocotte both are nouns.

Word	Noun	Adjective	Verb	Adverb
casserole	Yes	No	No	No
cocotte	Yes	No	No	No

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

casserole: large deep dish in which food can be cooked and served
cocotte: a small casserole in which individual portions can be cooked and served

casserole (noun)	cocotte (noun)
large deep dish in which food can be cooked and served	a small casserole in which individual portions can be cooked and served
food cooked and served in a casserole	a woman who engages in sexual intercourse for money