money, cash, change, currency

Money is the most general word for the notes and coins that you use for buying things 

 Can I borrow some money

Put the money straight in your purse

Use cash when you want to emphasize that you mean notes and coins, and not

cheques, credit cards etc 

You have to pay in cash - they don't accept cheques

Do not say 'pay by cash'. Say pay in cash

Use change when you mean money in the form of coins, or the money you get back when you pay for something with more money than it cost 

 I need some change for the phone

He left the shop without waiting for his change

Use currency to refer to the money of a particular country •

You'll need about £500 worth of Japanese currency