English. English exercises - grammar exercises - learn English online. Sound Grammar. Using during. Welcome to Online TEFL Training. New English File. Learn English. Confusing Words and Homonyms | Misued Words in English | Letter A. Letter A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z Many words in English sound or look alike, causing confusion and not a few headaches. This section lists some of these words, and other troublemakers. a.m., p.m.