Englishfor English speakers
revolution
Noun
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A revolution is a sudden significant change.
The Industrial Revolution began when machines were able to make things quicker and cheaper than people.
In the 1960s, you had the women's revolution, the sexual revolution, and all sorts of change.
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A revolution is a war against the government by the country's own people.
There was a revolution in France in 1789.
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When a wheel turns around once it has made a revolution; going in a circle; turning; revolving.
The hour hand on the clock makes one revolution in twelve hours.
rate
Noun
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Speed. A rate is how fast something happens. Something can go at a fast rate or a slow rate.
The rate of water pouring out of the lake into the river is enough to make the lake empty in a year if it doesn't rain.
Her heart rate is 70 beats every minute.
If we keep writing pages at this rate we might have 2000 Simple English Wiktionary words by August 4.
rate
Verb
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Someone rates something when they decide how much its value is (how much it's worth).
I rate this book at six out of ten: it was not the best book.