Some words you use every day are not really words--at least not yet. Words become official members of a vocabulary by sticking it out in common language until dictionary-makers give in. Here are a few that haven't made it yet (but some will):
Okay: Most people are surprised and irked when spell-checkers tell them that okay is not really a word. OK (or O.K.) is the spelling you should use. So where did OK come from? Oddly, some trace it to the presidential campaign of Martin Van Buren. It’s a long story.
Nevermind: Many people will argue that nevermind is a word. I’ll argue back: yes, sort of, but it's not a word that most people understand. It does not mean “disregard” or “don’t consider it any longer,” as many people believe. That expression is correctly written as two words: never mind.
The one-word nevermind is an outdated American noun that means heed—and is only correct in statements like “pay no nevermind to that man behind the curtain.”
Irregardless: This is just not a word. The correct word to use is “regardless.”
Alot: This is not a word, either! The correct phrase is a lot (two words).
Alright: The correct spelling is all right—for now. Alright is a nonstandard version, but it is working its way into our hearts and our dictionaries.