teacake vs cake

teacake and cake both are nouns.

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

As nouns, cake is a hypernym of teacake; that is, cake is a word with a broader meaning than teacake:

teacake: any of various small cakes or cookies often served with tea
cake: baked goods made from or based on a mixture of flour, sugar, eggs, and fat

teacake (noun)	cake (noun)
any of various small cakes or cookies often served with tea	a block of solid substance (such as soap or wax)
flat semisweet cookie or biscuit usually served with tea	baked goods made from or based on a mixture of flour, sugar, eggs, and fat
	small flat mass of chopped or ground food

teacake (verb)	cake (verb)
	form a coat over