Proposal vs. suggestion?

Hello everybody and Merry Christmas!
Could you please tell me the difference between proposal and suggestion? I understand that you can make a proposal and or a suggestion and both mean more less the same. I also know that a business proposal is more concrete and it can be written whearas a suggestion is usually more genera. Is that it or is there more? Thanks in advance and have a good time.
A

Hi Andreana,

What you have suggested is broadly correct. A proposal is something more positive because it gives the idea that something can be carried out/completed. Consider for example a marriage proposal or a proposal of marriage.
A suggestion is much more general - it is an idea that is offered that can be ignored or accepted.

Alan

Hi Alan,

Thanks a lot for your immediate and useful explanation. Could you please also take a look at my latest question:
english-test.net/forum/ftopic5812.html

Thanks
A