Cases of word usage

1) to state or write (something) as a reason or excuse, in support of a claim or in denial of a charge (allege)

2) a person in charge of an auction (auctioneer)

3) a person in charge of a building's cleaning, repairs etc (caretaker)

4) an elderly person (usually a woman) in charge of a girl or young unmarried woman (chaperon)

5) an officer in charge of a military operation (commander)

6) in charge (commanding)

7) an official in charge of a museum or art gallery (curator)

8) a very small particle of matter, smaller than an atom, having a negative electric charge (electron)

9) the government department in charge of public money (exchequer)

10) (of a price, charge or demand) much too high or great (exorbitant)