Belief vs Conviction vs Faith vs Opinion vs Trust

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

Belief

Top 1,000 (very common)B1noun

Conviction

Top 3,000 (common)C1noun

Faith

Top 1,000 (very common)B2noun

Opinion

Top 1,000 (very common)A1noun

Trust

Top 1,000 (very common)B2noun
 BeliefConvictionFaithOpinionTrust
Pronunciation🇬🇧 /["/bɪˈliːf/"]/🇺🇸 /["/bɪˈliːf/"]/🇬🇧 /["/kənˈvɪkʃn/"]/🇺🇸 /["/kənˈvɪkʃn/"]/🇬🇧 /["/feɪθ/"]/🇺🇸 /["/feɪθ/"]/🇬🇧 /["/əˈpɪnjən/"]/🇺🇸 /["/əˈpɪnjən/"]/🇬🇧 /["/trʌst/"]/🇺🇸 /["/trʌst/"]/
MeaningSomething you think is true.A strong belief or opinion.Believing in something or someone without needing proof.What you think about something.To believe in someone or something.
ExampleHer belief in the power of education changed her life.Her conviction for theft led to a five-year prison sentence.She put her faith in his ability to deliver the project on time.In my opinion, the movie was fantastic.Her trust in him was unwavering, even when others doubted him.
RegisterNeutralNeutralNeutralNeutralNeutral
How commonTop 1,000 (very common)Top 3,000 (common)Top 1,000 (very common)Top 1,000 (very common)Top 1,000 (very common)
CEFR levelB1C1B2A1B2
Part of speechnounnounnounnounnoun
Collocationsabsolute, deep-seated, deeply held, set, system, espouse, have, hold, persist, system, beyond belief, in the belief that, belief about, contrary to popular belief, absolute, deep-seated, deeply held, set, system, espouse, have, hold, persist, system, beyond belief, in the belief that, belief about, contrary to popular belief, absolute, deep-seated, deeply held, set, system, espouse, have, hold, persist, system, beyond belief, in the belief that, belief about, contrary to popular beliefearlier, previous, prior, have, lead to, obtain, be based on, rate, on conviction, conviction against, conviction for, the rate of conviction, absolute, complete, total, have, hold, share, politics, with conviction, without conviction, conviction about, have the courage of your convictions, absolute, complete, total, have, hold, share, politics, with conviction, without conviction, conviction about, have the courage of your convictionsenormous, great, tremendous, have, pin, place, faith in, an act of faith, a lack of faith, a leap of faith, religious, deep, genuine, have, come to, find, healer, healing, through faith, faith in, an article of faith, living, world, Catholic, profess, practise/​practice, keep alive, tradition, community, group, people of different faiths, bad, good, break, in bad faith, in good faith, keep faith with somebodygood, high, low, have, hold, air, change, differ, vary, piece, in your opinion, opinion about, opinion on, be of the opinion that…, a difference of opinion, in my humble opinion, prevailing, general, popular, body, mould/​mold, shape, sway, be against something, be in favour/​favor of something, be divided, poll, former, leader, opinion among, climate of opinion, shades of opiniongreat, absolute, complete, have, place, put, exist, trust among, trust between, trust for, a breach of trust, a lack of trust, a position of trust, offshore, investment, unit, hold something in, hold something on, keep something in, account, assets, fund, in trust, trust for, independent, charitable, non-profit, manage, run, own, manage, run, trust for
Antonymsdisbelief, skepticismdoubt, uncertainty, indecisiondoubt, skepticism, disbelieffact, certainty, truthdistrust, mistrust
Common mistakesConfusing 'belief' with 'believe' (the verb form)., Using 'beliefs' inappropriately when referring to a single idea., Misplacing the preposition (should be 'belief in' or 'belief on').Confused with 'confidence'; they have different meanings., Using 'conviction' as a verb; it's only a noun., Mispronouncing it or stressing the wrong syllable.Confused as a verb instead of a noun., Misusing in contexts where evidence is required., Spelling errors, such as 'faithe'.'Opinion' is often confused with 'view' or 'idea', but it’s more about personal belief., Saying 'in my opinion' too frequently can make writing sound repetitive., 'Opinion' is countable, so use 'an opinion' not 'a opinion'.Confused with 'rely on'—they have slightly different meanings., Using 'trust' with inanimate objects is uncommon—better to say 'rely on'., Mixing up 'trust' with 'believe'—they are similar but not interchangeable.
Usage notesUse 'belief' in discussions about opinions, faith, and confidence. It's appropriate in academic, personal, and religious contexts but may be too strong for casual discussions.Used in discussions about beliefs, legal contexts, or strong opinions. Avoid in casual conversations unless discussing beliefs seriously.Used in both personal and religious contexts. It can express trust in people or concepts. Avoid using in overly critical discussions.Use 'opinion' when discussing thoughts or views. It’s neutral and suits most situations but may be too informal for formal essays.Use 'trust' in neutral contexts like personal relationships or business. Avoid using it where skepticism is implied, such as in formal reports.

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Belief
Conviction
Faith
Opinion

Frequently asked questions: Belief vs Conviction vs Faith vs Opinion vs Trust

What's the difference between Belief, Conviction, Faith, Opinion, and Trust?

Belief: Something you think is true. Conviction: A strong belief or opinion. Faith: Believing in something or someone without needing proof. Opinion: What you think about something. Trust: To believe in someone or something.

Which is more advanced: Belief, Conviction, Faith, Opinion, and Trust?

Conviction is the highest level, at C1, on the CEFR scale.

Are Belief, Conviction, Faith, Opinion, and Trust the same CEFR level?

Belief: B1, Conviction: C1, Faith: B2, Opinion: A1, Trust: B2 on the CEFR scale.

What part of speech are Belief, Conviction, Faith, Opinion, and Trust?

Belief: noun, Conviction: noun, Faith: noun, Opinion: noun, Trust: noun.

Can you show an example of each?

Belief: Her belief in the power of education changed her life. Conviction: Her conviction for theft led to a five-year prison sentence. Faith: She put her faith in his ability to deliver the project on time. Opinion: In my opinion, the movie was fantastic. Trust: Her trust in him was unwavering, even when others doubted him.

Can I use Belief, Conviction, Faith, Opinion, and Trust interchangeably?

Not always. Belief, Conviction, Faith, Opinion, and Trust 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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