Detect vs Notice

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

Detect

Top 2,000 (common)B2verb

Notice

Top 1,000 (very common)A2verb
Most common: Notice
 DetectNotice
Pronunciation🇬🇧 //dɪˈtɛkt//🇺🇸 //dɪˈtɛkt//🇬🇧 /["/ˈnəʊtɪs/","/ˈnəʊtɪsɪz/","/ˈnəʊtɪst/","/ˈnəʊtɪsɪŋ/"]/🇺🇸 /["/ˈnəʊtɪs/","/ˈnəʊtɪsɪz/","/ˈnəʊtɪst/","/ˈnəʊtɪsɪŋ/"]/
MeaningTo notice or discover somethingto see or pay attention to something
ExampleThe scientist was able to detect the virus in the sample.I didn't notice the time passing while I was reading.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelB2A2
Part of speechverbverb
Collocationsdetect a signal, detect a problem, detect changesnot even, not really, barely, fail to, not appear to, not seem to, can’t help but notice something, can’t help noticing something, the first thing I, he, etc. noticed, not even, not really, barely, fail to, not appear to, not seem to, can’t help but notice something, can’t help noticing something, the first thing I, he, etc. noticed
Antonymsmiss, ignoreignore, overlook
Common mistakesConfusing with 'detective', which refers to a person, not the action., Using intransitively; 'detect' requires an object.'Notice' is sometimes confused with 'notify' — 'to notify' means to inform someone., Learners may use 'noticing' incorrectly as a noun; the correct noun is 'notice'., Some learners forget to use 'notice' in the simple past form 'noticed' when talking about past events.
Usage notesCommonly used in both scientific and everyday contexts. Avoid using in very casual speech.Use 'notice' when you become aware of something. It's appropriate in both spoken and written English, but more formal contexts might use 'observe' instead.

See it in real clips

Detect
Notice

Frequently asked questions: Detect vs Notice

What's the difference between Detect and Notice?

Detect: To notice or discover something Notice: to see or pay attention to something

Which is more common: Detect and Notice?

Notice is the most common in everyday English.

Which is more advanced: Detect and Notice?

Detect is the highest level, at B2, on the CEFR scale.

Are Detect and Notice the same CEFR level?

Detect: B2, Notice: A2 on the CEFR scale.

What part of speech are Detect and Notice?

Detect: verb, Notice: verb.

Can you show an example of each?

Detect: The scientist was able to detect the virus in the sample. Notice: I didn't notice the time passing while I was reading.

Can I use Detect and Notice interchangeably?

Not always. Detect and Notice 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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