The only difference between ambassador and ambassador is the difference in spelling. Embassador is an alternative to an ambassador.
An ambassador is, or embassador is someone that represents a foreign entity, which can be a foreign government or an international organization. An ambassador can be a political representative or a goodwill representative.
A political ambassador is someone sent by a country to another country as a representative; they are normally appointed by the head of state of their country.
The ambassadors can reside in the embassy. Political ambassador deals with political concerns, issues, and other aspects of their relationships. A goodwill ambassador deals with global issues; they deal with secular and political issues that affect the globe.
A lot of people are usually confused when they see the ambassador and ambassador because they seem to be the same. You should know that they are considered to be the same. It will just depend on you, which one you think will be more appropriate to use.
Just in case you do not know what an ambassador means, this is known to be a minister that will usually be sent to another foreign court to represent his/her own country. Sometimes, you can also say that an ambassador is someone who is considered to be a representative of something.
For example, someone may be needed as a messenger. The ambassador or the ambassador will definitely be needed.