Hypothesis vs Inference

When to use each in English, with meaning, register, and examples.

Hypothesis

FormalTop 3,000 (common)B2noun

Inference

Beyond 10,000 (less common)
Most formal: HypothesisMost common: Hypothesis
 HypothesisInference
Pronunciation🇬🇧 /["/haɪˈpɒθəsɪs/","/haɪˈpɒθəsiːz/"]/🇺🇸 /["/haɪˈpɑːθəsɪs/","/haɪˈpɑːθəsiːz/"]/🇬🇧 //ˈɪn.fər.əns//🇺🇸 //ˈɪn.fər.əns//
MeaningAn idea or guess that can be tested.A guess or conclusion based on evidence or reasoning.
ExampleThe hypothesis proposed by the scientists was groundbreaking in its implications.From her expression, we can make an inference about her feelings.
RegisterFormalNeutral
How commonTop 3,000 (common)Beyond 10,000 (less common)
CEFR levelB2-
Part of speechnoun
Collocationsplausible, bold, speculative, construct, develop, form, concern something, be based on something, predict something, on a/​the hypothesis, hypothesis about, hypothesis concerningdraw an inference, make an inference, logical inference, scientific inference, inference from evidence
Antonymsfact, certainty, truth-
Common mistakesConfused with 'theory' - a hypothesis is not proven yet., Sometimes used as a verb, but it's only a noun., Plural is often mistakenly written as 'hypothesises' instead of 'hypotheses'.Confused with 'influence' vs 'inference', Using 'inference' as a verb instead of a noun, Omitting context when making inferences
Usage notesUsed mainly in academic and scientific contexts. Avoid using it in everyday conversation as it's too technical for casual discussions.Used often in academic and analytical contexts. Not appropriate for casual conversations.

Frequently asked questions: Hypothesis vs Inference

What's the difference between Hypothesis and Inference?

Hypothesis: An idea or guess that can be tested. Inference: A guess or conclusion based on evidence or reasoning.

Which is more formal: Hypothesis and Inference?

Hypothesis is the most formal of these.

Which is more common: Hypothesis and Inference?

Hypothesis is the most common in everyday English.

Can I use Hypothesis and Inference interchangeably?

Not always. Hypothesis and Inference are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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