Cause vs Factor vs Motive vs Reason vs Stimulus

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

Cause

Top 1,000 (very common)A2noun

Factor

Top 1,000 (very common)A2noun

Motive

Top 1,000 (very common)C1noun

Reason

Top 1,000 (very common)A1noun

Stimulus

Top 2,000 (common)C1noun
 CauseFactorMotiveReasonStimulus
Pronunciation🇬🇧 /["/kɔːz/"]/🇺🇸 /["/kɔːz/"]/🇬🇧 /["/ˈfæktə(r)/"]/🇺🇸 /["/ˈfæktər/"]/🇬🇧 /["/ˈməʊtɪv/"]/🇺🇸 /["/ˈməʊtɪv/"]/🇬🇧 /["/ˈriːzn/"]/🇺🇸 /["/ˈriːzn/"]/🇬🇧 /["/ˈstɪmjələs/","/ˈstɪmjəlaɪ/"]/🇺🇸 /["/ˈstɪmjələs/","/ˈstɪmjəlaɪ/"]/
MeaningThe reason something happens.One of the parts that helps to make something happen.The reason someone does something.An explanation or cause for something.Something that causes a reaction or change.
ExampleThe cause of the accident was a flat tire.One important factor to consider when making a decision is the cost.The detective was trying to find the motive behind the crime.The reason I am late is because of traffic.The bright light served as a stimulus that caused the plant to grow towards it.
RegisterNeutralNeutralNeutralNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)Top 1,000 (very common)Top 1,000 (very common)Top 2,000 (common)
CEFR levelA2A2C1A1C1
Part of speechnounnounnounnounnoun
Collocationsreal, root, true, determine, discover, find, be, lie in something, remain, cause of, cause and effect, the cause of death, due to natural causes, good, great, real, have, find, give (somebody), cause for, cause for concern, with good cause, without good cause, deserving, good, just, advance, champion, embrace, for the cause of, in the cause of, in a/​the cause, (all) for a good cause, (all) in a good causebig, important, main, consider, take into account, identify, be involved, operate, affect something, factor behind, factor in, a combination, number, variety, etc. of factorshidden, ulterior, good, be inspired by, have, establish, drive somebody/​something, motive in, motive behind, motive for, a variety of motivescogent, good, sound, be aware of, see, have, by reason of, for a/​the reason, for reason of, all the more reason, all sorts of reasons, every reason, cogent, good, sound, be aware of, see, have, by reason of, for a/​the reason, for reason of, all the more reason, all sorts of reasons, every reason, human, lose, be open to, listen to, beyond reason, within reason, an appeal to reason, faculty of reason, sense of reason, human, lose, be open to, listen to, beyond reason, within reason, an appeal to reason, faculty of reason, sense of reasongreat, major, powerful, act as, give, provide, come from something, bill, package, plan, stimulus for, stimulus to, a response to a stimulus, great, major, powerful, act as, give, provide, come from something, bill, package, plan, stimulus for, stimulus to, a response to a stimulus
Antonymseffect, resultresult, outcomeapathy, indifferencecause, consequenceinhibition, restraint
Common mistakesConfusing 'cause' with 'because' in sentences., Using 'caused' incorrectly when the present form 'cause' is needed., Incorrectly using 'cause' as a noun instead of a verb.Confused with 'factor' as a verb vs. noun., Using 'fact' instead of 'factor'., Pluralizing incorrectly as 'factorses'.Confused with 'motive' vs 'motif' (artistic theme), Using 'motive' for general causes instead of specific reasons, Incorrectly pluralizing as 'motives' when referring to a singular reasonConfused with 'rationale' — 'reason' is broader., Using 'reason' without 'for' — remember to include it when explaining cause., Mispronouncing as 'ree-zen' instead of 'ree-zon'.Confused with 'stimulation', which refers more to the act of exciting or invigorating., Mistakenly pluralized as 'stimuli' in informal contexts., Used incorrectly as a verb; 'stimulate' is the verb form.
Usage notesUse 'cause' in standard writing and conversation. In formal contexts, you might use 'cause' less frequently, opting for 'cause' instead. Avoid using it in very casual or children's language.Use 'factor' in both academic and everyday contexts when discussing influences or components. It's appropriate in formal writing and discussions but less common in casual speech.Used in both formal and informal settings. Common in discussions about reasons behind actions, but avoid in casual conversations unless discussing motivations seriously.Used in both formal and informal contexts. In formal writing, it often appears in discussions and academic papers. In conversational settings, it's common to ask for someone's reason behind their choices.Commonly used in science and psychology to describe factors that lead to responses. Avoid in casual conversations unless discussing specific studies or theories.

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Frequently asked questions: Cause vs Factor vs Motive vs Reason vs Stimulus

What's the difference between Cause, Factor, Motive, Reason, and Stimulus?

Cause: The reason something happens. Factor: One of the parts that helps to make something happen. Motive: The reason someone does something. Reason: An explanation or cause for something. Stimulus: Something that causes a reaction or change.

Are Cause, Factor, Motive, Reason, and Stimulus the same CEFR level?

Cause: A2, Factor: A2, Motive: C1, Reason: A1, Stimulus: C1 on the CEFR scale.

What part of speech are Cause, Factor, Motive, Reason, and Stimulus?

Cause: noun, Factor: noun, Motive: noun, Reason: noun, Stimulus: noun.

Can you show an example of each?

Cause: The cause of the accident was a flat tire. Factor: One important factor to consider when making a decision is the cost. Motive: The detective was trying to find the motive behind the crime. Reason: The reason I am late is because of traffic. Stimulus: The bright light served as a stimulus that caused the plant to grow towards it.

Can I use Cause, Factor, Motive, Reason, and Stimulus interchangeably?

Not always. Cause, Factor, Motive, Reason, and Stimulus 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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