Accomplish vs Achieve vs Complete vs Execute vs Realize

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

Accomplish

Top 1,000 (very common)B2verb

Achieve

Top 1,000 (very common)A2verb

Complete

Top 1,000 (very common)A1adjective

Execute

Top 2,000 (common)C1verb

Realize

Top 1,000 (very common)A2verb
 AccomplishAchieveCompleteExecuteRealize
Pronunciation🇬🇧 /["/əˈkʌmplɪʃ/","/əˈkʌmplɪʃɪz/","/əˈkʌmplɪʃt/","/əˈkʌmplɪʃɪŋ/"]/🇺🇸 /["/əˈkɑːmplɪʃ/","/əˈkɑːmplɪʃɪz/","/əˈkɑːmplɪʃt/","/əˈkɑːmplɪʃɪŋ/"]/🇬🇧 /["/əˈtʃiːv/","/əˈtʃiːvz/","/əˈtʃiːvd/","/əˈtʃiːvɪŋ/"]/🇺🇸 /["/əˈtʃiːv/","/əˈtʃiːvz/","/əˈtʃiːvd/","/əˈtʃiːvɪŋ/"]/🇬🇧 /["/kəmˈpliːt/"]/🇺🇸 /["/kəmˈpliːt/"]/🇬🇧 /["/ˈeksɪkjuːt/","/ˈeksɪkjuːts/","/ˈeksɪkjuːtɪd/","/ˈeksɪkjuːtɪŋ/"]/🇺🇸 /["/ˈeksɪkjuːt/","/ˈeksɪkjuːts/","/ˈeksɪkjuːtɪd/","/ˈeksɪkjuːtɪŋ/"]/🇬🇧 /["/ˈriːəlaɪz//ˈrɪəlaɪz/","/ˈriːəlaɪzɪz//ˈrɪəlaɪzɪz/","/ˈriːəlaɪzd//ˈrɪəlaɪzd/","/ˈriːəlaɪzɪŋ//ˈrɪəlaɪzɪŋ/"]/🇺🇸 /["/ˈriːəlaɪz/","/ˈriːəlaɪzɪz/","/ˈriːəlaɪzd/","/ˈriːəlaɪzɪŋ/"]/
MeaningTo successfully complete something.To successfully reach a goal or complete something.To finish something completely.To carry out or perform a task or order.To understand something clearly.
ExampleThe first part of the plan has been safely accomplished.She worked hard to achieve her goals.The puzzle is now complete after I found the last piece.The software will execute the commands as soon as they are entered.I didn't realize how important that meeting was until it was too late.
RegisterNeutralNeutralNeutralNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)Top 1,000 (very common)Top 2,000 (common)Top 1,000 (very common)
CEFR levelB2A2A1C1A2
Part of speechverbverbadjectiveverbverb
Collocationssuccessfully, easilyfail to, be able to, try to, fail to, be able to, try tobe, seem, survive, remarkably, very, far from, be, seem, almost, nearly, substantiallysummarily, illegally, publicly, as, for, beautifully, boldly, brilliantly, duly executed, beautifully, boldly, brilliantly, duly executedfully, dimly, suddenly, begin to, come to, make somebody, with, without realizing (something)
Antonymsfail, neglect, abandonfail, miss, loseincomplete, unfinished, partialcancel, abort, neglectignore, overlook, miss
Common mistakesConfusing with 'accomplished' which is an adjective., Using 'accomplish' without an object (e.g., saying 'I accomplish.' instead of 'I accomplish my goals.').Confused with 'complete' or 'accomplish', Using 'achieve' with non-count nouns incorrectly, Mistakenly using 'achieve' in informal settingsConfused with 'finished' — both mean to end, but 'complete' emphasizes fullness., Using 'complete' when a task is partially done., 'Complete' is sometimes incorrectly used as a noun.'Execute' is often confused with 'prosecute'; remember they have different meanings., Learners may forget that 'execute' typically requires an object, e.g., 'execute a plan'., 'Execute' is sometimes incorrectly used in informal situations where simpler verbs would be more suitable.Confusing 'realize' with 'realised' in British English., Using 'realize' without an object (e.g. 'I realized that' is correct)., Mixing up 'realize' with 'recognize'; they have different meanings.
Usage notesUse 'accomplish' when referring to achieving goals or tasks, typically in a positive context. It may not be appropriate for casual or less formal situations where simpler words like 'do' might work better.Use 'achieve' when talking about completing a goal or success in a task. It's appropriate in both personal and professional contexts, but avoid it in very casual conversations.Use 'complete' in academic or professional contexts when discussing tasks, projects, or forms. Avoid using it in overly casual conversations.Use 'execute' in formal contexts, such as legal or technical situations. It may sound too rigid in everyday conversation; prefer simpler terms like 'do' or 'carry out' in casual settings.Use 'realize' when you come to a new understanding or awareness of something. It's neutral and suitable for both spoken and written contexts. Avoid using it in very formal writing where 'become aware of' might be preferred.

Frequently asked questions: Accomplish vs Achieve vs Complete vs Execute vs Realize

What's the difference between Accomplish, Achieve, Complete, Execute, and Realize?

Accomplish: To successfully complete something. Achieve: To successfully reach a goal or complete something. Complete: To finish something completely. Execute: To carry out or perform a task or order. Realize: To understand something clearly.

Which is more advanced: Accomplish, Achieve, Complete, Execute, and Realize?

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

Are Accomplish, Achieve, Complete, Execute, and Realize the same CEFR level?

Accomplish: B2, Achieve: A2, Complete: A1, Execute: C1, Realize: A2 on the CEFR scale.

What part of speech are Accomplish, Achieve, Complete, Execute, and Realize?

Accomplish: verb, Achieve: verb, Complete: adjective, Execute: verb, Realize: verb.

Can you show an example of each?

Accomplish: The first part of the plan has been safely accomplished. Achieve: She worked hard to achieve her goals. Complete: The puzzle is now complete after I found the last piece. Execute: The software will execute the commands as soon as they are entered. Realize: I didn't realize how important that meeting was until it was too late.

Can I use Accomplish, Achieve, Complete, Execute, and Realize interchangeably?

Not always. Accomplish, Achieve, Complete, Execute, and Realize 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.

Related comparisons