Stegnography is defined as the art of hiding information, data or messages in an image. Even the different file formats can be used for the purpose of hiding the information like for example the video or audio etc. The purpose is to pass on the information with out any regard or knowledge of others safely to the destination. The advantage of stegnography is that those who are outside the party even do not realize that some sort of communication is being done.
I think no same meaning , only spellings are different.