Na is a 2 letter English word. It's valid Scrabble word worth 2 points. It's valid Words with friends word worth 3 points.
You can make 5 anagrams from letters in NA (an).
before 900; Middle English (north and Scots); in part representing Old English nā (n(e) not, nor + ā ever; cf. ay1); in part variant of ne; cf. Examples for NA
She was gonna be in New York and wanted to hang around for New Years and hopefully be able to stay long enough to meet our baby. There is neither contribution nor tax, (na mal na threth) which we ought to pay. He shook his head, grunting, "na—I don't know naught about t' shoals." He was gonna join the fight, you know, really he was, got his ninja getup fitted and everything. No, we think, “Ugh, now who is gonna clean all the blood from the street!” But when he heard “A Change Is Gonna Come,” he asked to hear it again. "It's na much as we ha' gotten to put away these times," said the first speaker. Some other simpering thing, na doot-they're all alike these days. I think 2014 was my big rock and roll year, and 2015 is gonna be a really good year to hang around the house. "That Wilson was na shaks nowther," continued Matthew quietly.