Log vs Register

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

Log

Top 1,000 (very common)C1noun

Register

Top 2,000 (common)B2verb
Most common: Log
 LogRegister
Pronunciation🇬🇧 /["/lɒɡ/"]/🇺🇸 /["/lɔːɡ/"]/🇬🇧 /["/ˈredʒɪstə(r)/","/ˈredʒɪstəz/","/ˈredʒɪstəd/","/ˈredʒɪstərɪŋ/"]/🇺🇸 /["/ˈredʒɪstər/","/ˈredʒɪstərz/","/ˈredʒɪstərd/","/ˈredʒɪstərɪŋ/"]/
MeaningA piece of wood that has been cut from a tree, or a record of events.A way of speaking or writing that fits a situation.
ExampleThe ship's captain kept a detailed log of the entire voyage.You need to register for the conference in advance to secure your spot.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelC1B2
Part of speechnounverb
Collocationscut, sawn, fallen, chop, saw, split, blaze, burn, crackle, cabin, house, fire, detailed, daily, captain’s, keep, maintain, update, book, sheet, entryformally, officially, properly, be required to, have to, must, as, at, for, newly registered, barely, hardly, dimly, fail to, not seem to, begin to
Antonymsdischarge, export, erasecolloquial, informal
Common mistakesConfused with 'logged' as a past tense verb., Using 'log' only in relation to trees and not recognizing the meaning of records., Mispronouncing 'log' as 'lag'.Confused with 'registrar', which is a person who keeps records., Using 'register' to mean 'register for an event', which is different., Misunderstanding the term as only relating to written language, ignoring spoken forms.
Usage notesUse 'log' when referring to tree trunks or records of events. Avoid in casual conversations about smaller sticks or everyday actions unless specifically referencing a log book.Use 'register' when discussing levels of formality in language. Appropriate in both academic and casual discussions. Avoid using it in purely informal or slang contexts.

Frequently asked questions: Log vs Register

What's the difference between Log and Register?

Log: A piece of wood that has been cut from a tree, or a record of events. Register: A way of speaking or writing that fits a situation.

Which is more common: Log and Register?

Log is the most common in everyday English.

Which is more advanced: Log and Register?

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

Are Log and Register the same CEFR level?

Log: C1, Register: B2 on the CEFR scale.

What part of speech are Log and Register?

Log: noun, Register: verb.

Can you show an example of each?

Log: The ship's captain kept a detailed log of the entire voyage. Register: You need to register for the conference in advance to secure your spot.

Can I use Log and Register interchangeably?

Not always. Log and Register 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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