I have had a look on the definitions of these three similar words in dictionaries, but unfortunately I cannot differentiate between them! For more clarification I have provided you with a sentence using them where I cannot distinguish their meanings:
- He held a concert in aid of the earthquake-stricken people.
- He held a concert for earthquake-stricken people relief.
- He held a concert in order to help earthquake-stricken people.
- He gets around with the aid of a walking stick.
- He gets around with the help of a walking stick.
As another example I don't know what to say in the following sentence to sound natural:
- I hope I can do that with your help / with your aid / etc.
The only think that strikes me is that:
- Aid and relief --- are more about the situation that someone is in need while help can be used in any circumstance.
Please let me know about them.
some other structures that I'm not sure which one sounds natural:
- She went to the aid of a man trapped in his car.
- She went to the help of a man trapped in his car.
She went to assist a man trapped in his car.