Vocabulary is one thing which takes lot of time to develop so make a routine to daily do one set of exercises. It will not only fetch you marks in vocabulary related questions but will also help you to a great extent in Analogy Tests where one goes wrong because of not knowing meanings of many words.
manager, manner, manufacturer, manufacturing, many, map, margin, mark, market, marketing, marriage, married, marry, mask, mass, massive, master, match, material, math, matter, may, maybe, mayor, me, meal, mean, meaning, meanwhile, measure, measurement, meat, mechanism, media, medical, medication, medicine,
none, nonetheless, nor, normal, normally, north, northern, nose, not, note, nothing, notice, notion, novel, now, nowhere, n't, nuclear, number, numerous, nurse, nut, object, objective, obligation, observation, observe, observer, obtain, obvious, obviously, occasion, occasionally, occupation, occupy,