Cases of word usage

1) a kind of small round, sweet cake (bun)

2) a very small piece (of bread, cake etc) (crumb)

3) a portion of minced or chopped meat made into a round flat cake and fried; a bread roll filled with this (hamburger)

4) (a cake of) whites of egg mixed with sugar and baked (meringue)

5) a kind of cake of oatmeal or flavour etc baked quickly (scone)

6) a thing, event, of little value or importance; a small amount of money; (a portion of) a sweet dish made of cake with jam, jelly, cream etc; to treat a person, feeling lightly or insincerely (trifle)

7) a kind of sweet cake made of batter; talk or writing which (even when it sounds impressive) means little or nothing (waffle)