Doubt vs Suspicion vs Uncertainty

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

Doubt

Top 1,000 (very common) B1 noun

Suspicion

Top 3,000 (common) C1 noun

Uncertainty

Top 1,000 (very common) B2 noun

	Doubt	Suspicion	Uncertainty
Pronunciation	🇬🇧 //daʊt// 🇺🇸 //daʊt// Hear Doubt	🇬🇧 /["/səˈspɪʃn/"]/ 🇺🇸 /["/səˈspɪʃn/"]/ Hear Suspicion	🇬🇧 /["/ʌnˈsɜːtnti/"]/ 🇺🇸 /["/ʌnˈsɜːrtnti/"]/ Hear Uncertainty
Meaning	A feeling of not being sure about something.	A feeling that something is wrong or not true.	Not being sure about something.
Example	He expressed doubt about the accuracy of the report.	She felt a strong suspicion that someone was hiding the truth.	The uncertainty about the future made it difficult for her to make long-term plans.
Register	Neutral	Neutral	Neutral
How common	Top 1,000 (very common)	Top 3,000 (common)	Top 1,000 (very common)
CEFR level	B1	C1	B2
Part of speech	noun	noun	noun
Collocations	express doubt, have doubt, cast doubt, doubt someone's intentions	strong, considerable, deep, degree, level, entertain, harbour/​harbor, have, arise, exist, linger, above suspicion, beyond suspicion, on suspicion of, the finger of suspicion, grounds for suspicion, an object of suspicion, strong, considerable, deep, degree, level, entertain, harbour/​harbor, have, arise, exist, linger, above suspicion, beyond suspicion, on suspicion of, the finger of suspicion, grounds for suspicion, an object of suspicion, strong, considerable, deep, degree, level, entertain, harbour/​harbor, have, arise, exist, linger, above suspicion, beyond suspicion, on suspicion of, the finger of suspicion, grounds for suspicion, an object of suspicion	considerable, great, high, amount, degree, element, cause, create, generate, surround something, exist, remain, uncertainty about, uncertainty as to, uncertainty in, an area of uncertainty, an atmosphere of uncertainty, a climate of uncertainty, considerable, great, high, amount, degree, element, cause, create, generate, surround something, exist, remain, uncertainty about, uncertainty as to, uncertainty in, an area of uncertainty, an atmosphere of uncertainty, a climate of uncertainty
Antonyms	certainty, confidence, belief	trust, confidence	certainty, assurance, confidence
Common mistakes	Confused with 'suspicion' - 'doubt' refers to uncertainty, not mistrust., Using 'doubt' in affirmative sentences instead of negatives., Misunderstanding the difference between 'doubt' and 'question' as they aren't always interchangeable.	Confused with 'suspect' which is a verb., Using 'suspicion' as a countable noun incorrectly., Mixing it up with 'distrust', which has a different meaning.	Confusing 'uncertainty' with 'insecurity' which has different meanings., Using 'uncertainty' in situations that require more concrete terms., Not differentiating between 'uncertainty' as a state and the causes of that uncertainty.
Usage notes	Used when uncertain or unsure. Common in both spoken and written contexts. Avoid in very formal settings.	Use 'suspicion' when you think something might be bad or wrong, often without proof. It's appropriate in serious contexts but less suitable in casual conversation.	Use 'uncertainty' in formal discussions, such as scientific or academic contexts. Avoid it in casual conversations where simpler words like 'doubt' may be more appropriate.

Frequently asked questions: Doubt vs Suspicion vs Uncertainty

What's the difference between Doubt, Suspicion, and Uncertainty?

Doubt: A feeling of not being sure about something. Suspicion: A feeling that something is wrong or not true. Uncertainty: Not being sure about something.

Are Doubt, Suspicion, and Uncertainty the same CEFR level?

Doubt: B1, Suspicion: C1, Uncertainty: B2 on the CEFR scale.

Can I use Doubt, Suspicion, and Uncertainty interchangeably?

Not always. Doubt, Suspicion, and Uncertainty 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.