Fill vs Fill them up vs Load vs Stuff

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

Fill

Top 1,000 (very common)A1verb

Fill them up

Top 2,000 (common)

Load

Top 1,000 (very common)B2noun

Stuff

InformalTop 1,000 (very common)B1noun
 FillFill them upLoadStuff
Pronunciation🇬🇧 /["/fɪl/","/fɪlz/","/fɪld/","/ˈfɪlɪŋ/"]/🇺🇸 /["/fɪl/","/fɪlz/","/fɪld/","/ˈfɪlɪŋ/"]/🇬🇧 //fɪl ðɛm ʌp//🇺🇸 //fɪl ðɛm ʌp//🇬🇧 /["/ləʊd/"]/🇺🇸 /["/ləʊd/"]/🇬🇧 /["/stʌf/"]/🇺🇸 /["/stʌf/"]/
MeaningTo make something full by putting something inside it.Make something full, especially with a liquid.To put something heavy onto something, like a truck.Things or objects.
ExamplePlease fill the glass with water.Please fill them up with water before the party starts.The truck can carry a heavy load of equipment for the construction site.I need to pack all my stuff for the trip.
RegisterNeutralNeutralNeutralInformal
How commonTop 1,000 (very common)Top 2,000 (common)Top 1,000 (very common)Top 1,000 (very common)
CEFR levelA1-B2B1
Part of speechverbnounnoun
Collocationsfast, quickly, rapidly, begin to, seem to, with, be filled to capacity, be filled to the brim (with something)fill them up with water, fill them up to the brim, fill them up completelyheavy, light, full, bear, carry, shoulder, under its, etc. load, heavy, light, full, bear, carry, shoulder, under its, etc. load, heavy, light, full, bear, carry, shoulder, under its, etc. loada bunch of stuff, some stuff, stuff to do
Antonymsempty, drain, remove-unload, emptynothing, emptiness
Common mistakesConfusing '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'.Omitting 'up' (e.g., saying 'fill them' instead of 'fill them up')., Using it with non-containers (e.g., 'fill them up' for ideas instead of physical objects).'Loaded' confused with 'load' when speaking., 'Load' used without an object (e.g., 'I will load' instead of 'I will load the truck')., 'Load' misused in non-physical contexts, like emotions.Using 'stuff' as a singular noun., Confusing 'stuff' with more specific vocabulary., Overusing 'stuff' instead of being specific.
Usage notesUse '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.Used for actions involving containers or spaces. Common in everyday conversation, less formal than 'fill to capacity'.Use 'load' when referring to putting items on vehicles or carrying heavy things. Avoid in very formal writing; instead, use 'cargo' or 'shipment'.Used in casual conversation to refer to things in general. Avoid in formal writing or speeches.

See it in real clips

Fill
Fill them up
Load
Stuff

Frequently asked questions: Fill vs Fill them up vs Load vs Stuff

What's the difference between Fill, Fill them up, Load, and Stuff?

Fill: To make something full by putting something inside it. Fill them up: Make something full, especially with a liquid. Load: To put something heavy onto something, like a truck. Stuff: Things or objects.

Which is more advanced: Fill, Fill them up, Load, and Stuff?

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

Can you show an example of each?

Fill: Please fill the glass with water. Fill them up: Please fill them up with water before the party starts. Load: The truck can carry a heavy load of equipment for the construction site. Stuff: I need to pack all my stuff for the trip.

Can I use Fill, Fill them up, Load, and Stuff interchangeably?

Not always. Fill, Fill them up, Load, and Stuff 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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