Englishfor English speakers
certainty
Noun
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Certainty is the state of being 100% sure.
It's a little too early to say that with absolute certainty.
The doctor could not say what was wrong with any degree of certainty.
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If something is a certainty, it is sure to happen.
The expected change became a certainty two weeks ago.
We need to accept the certainties of aging, illness, and death.
equivalent
Adjective
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If two things are equivalent, they are of equal value or acceptability.
Dolphins have very large brains, roughly equivalent to the size of a human brain.
equivalent
Noun
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An equivalent is something of equal value of acceptability.
Living in Thailand costs the equivalent of just £10 per day.
method
Noun
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If you use a method to achieve a goal, then you use a planned process.
It is quite simple to use the method described in Section 7.2 to find the solution.
My preferred method for contacting friends overseas is on the Internet.