two weeks(n = noun.time) fortnight - a period of fourteen consecutive days; "most major tennis tournaments last a fortnight"
is a kind of period, period of time, time period

feast of weeks, in two ways, two, two bits, two dollar bill, two dozen, two faced, two hundred, two iron, two kettle, two ply, two shakes, two sided, two time, two timer, two times, two year old