Are MSG and Accent (Seasoning) the same thing

You should refer to the discussion here: Are MSG and Accent (Seasoning) the same thing?

Some relevant points: MSG is found naturally in seaweed and other things. It is used to enhance the flavors it is combined with.

It is completely harmless unless you are limiting your sodium intake. Check out the wikipedia article on the subject as a starting point: http://en.wikipedia.org/wiki/Monosodium_glutamate#Health_concerns

In short there has been no linkage to any adverse effects found in many controlled studies.

As far as replacing it- You can leave it out altogether or add a little salt.

The problem is, both Sarge's and Carmi's answers are right depending on who is using the word. Some people use the word seasoning to just mean salt, some mean salt and pepper, and some mean "anything you want to use to bring the flavor to the desired point, including salt, pepper, lemon juice, spices, herbs, etc." If you are dealing with someone in person, it is best to ask. With a cookbook, sometimes you can figure it out from context or from other recipes. Otherwise, you'll have to make your own best call. In my own recipes, I will generally write "taste and adjust seasoning, adding salt and/or more lemon juice as needed".