Paraphrasing something that would otherwise be plagiarism does not stop it from being plagiarism. Similarly, trying to get the same thing published twice is a problem, whether or not it uses the same language.
However, at least in the UK it is normally fine for ideas that are in a MSc or PhD thesis to also appear in a journal article. I would not worry about using the same words, when it's appropriate to do so.
If you want to be sure, you could write to the editor of your intended journal to check. Either way, it would be wise to mention the situation in the cover letter when you submit your article, just in case they run it through a "plagiarism detector".