We often call folks Reformed who do not belong to a Reformed denomination. It has become a catchword loosely and wrongly used by confessional Lutherans to refer to all those who are not confessional Lutherans (and also neither Orthodox nor Roman Catholic). We often call folks Protestant but when it comes to what that words means, we find ourselves caught between its classical meaning (in which Lutheranism might fit) and its modern usage (in which most Lutherans would not at all fit). We often call folks fundamentalists but this no longer has historic reference to the fundamentals for which a segment of Christians once stood and has become, in effect, a nasty word applicable to extremists (extremism being always distasteful). We often call folks evangelical even though they might not agree (some evangelicals being more or less fundamentalists who no longer like the moniker and others being rather liberal and objecting to most all of those things which fundamentalism espoused, save perhaps individual and personal conversion).
Lutherans may be Protestant but probably are not. Reformed are always evangelicals but probably not funadmentalists. Fundamentalists are generally evangelicals but evangelicals are mostly not fundamentalists. Are you confused yet?