Choose the word that describes the best antonym (opposite) of the following words.
Hypothesis

Fact

The word that best describes the antonym of hypothesis is fact.

• Hypothesis is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
• Fact is a thing that is known or proved to be true.

The other options are not opposites of hypothesis.

• Theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment.
• Conclusion is a judgment or decision reached after considering the evidence.
• Experiment is a scientific procedure carried out to test or establish the validity of a hypothesis.