cookie vs teacake

cookie and teacake both are nouns.

Word	Noun	Adjective	Verb	Adverb
cookie	Yes	No	No	No
teacake	Yes	No	No	No

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

cookie (noun)	teacake (noun)
a short line of text that a web site puts on your computer's hard drive when you access the web site	any of various small cakes or cookies often served with tea
any of various small flat sweet cakes	flat semisweet cookie or biscuit usually served with tea
the cook on a ranch or at a camp