Complete vs Fill
When to use each in English, with meaning, register, and examples.
Complete
Top 1,000 (very common)A1adjective
Fill
Top 1,000 (very common)A1verb
| Complete | Fill | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/kəmˈpliːt/"]/🇺🇸 /["/kəmˈpliːt/"]/ | 🇬🇧 /["/fɪl/","/fɪlz/","/fɪld/","/ˈfɪlɪŋ/"]/🇺🇸 /["/fɪl/","/fɪlz/","/fɪld/","/ˈfɪlɪŋ/"]/ |
| Meaning | To finish something completely. | To make something full by putting something inside it. |
| Example | The puzzle is now complete after I found the last piece. | Please fill the glass with water. |
| Register | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 1,000 (very common) |
| CEFR level | A1 | A1 |
| Part of speech | adjective | verb |
| Collocations | be, seem, survive, remarkably, very, far from, be, seem, almost, nearly, substantially | fast, quickly, rapidly, begin to, seem to, with, be filled to capacity, be filled to the brim (with something) |
| Antonyms | incomplete, unfinished, partial | empty, drain, remove |
| Common mistakes | Confused 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. | Confusing 'fill' with 'fulfill' in contexts of completion., Using 'filled' instead of 'fill' in present tense statements., Mixing up the order of words, like saying 'to fill it with water' instead of 'fill it with water'. |
| Usage notes | Use 'complete' in academic or professional contexts when discussing tasks, projects, or forms. Avoid using it in overly casual conversations. | Use 'fill' when talking about putting substance into an empty space. It's common in both casual and formal contexts. Avoid using for emotional or abstract concepts, as it can lead to confusion. |
Frequently asked questions: Complete vs Fill
What's the difference between Complete and Fill?
Complete: To finish something completely. Fill: To make something full by putting something inside it.
Are Complete and Fill the same CEFR level?
Complete: A1, Fill: A1 on the CEFR scale.
Can I use Complete and Fill interchangeably?
Not always. Complete and Fill 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.