Alarm [əˈlɑːm] - будильник
Clock [klɒk] - часы, настенные часы
Watch [wɒʧ] - часы, наручные часы
I heard the clock strike six.
Я услышал, что часы пробили 6.
A watch - a small clock that you wear on your wrist or keep in your pocket.
Alarm - a clock that makes a noise at a particular time to wake you up.
