N,n

=nail;; name;; nano;; nation;; nationalist;; navy;; neap;; negative;; nephew;; net;; neuter;; neutral;; new;; newton;; nominative;; none;; non-maligment;; noon;; normal;; Norse;; north;; northern;; Norway;; note;; noun;; nozzle;; November;; nucleus;; number;; nurse;; nylon;; revolutions per unit time 每单位时间的转数