Float vs Swim

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

Float

Top 1,000 (very common)B2verb

Swim

Top 1,000 (very common)A1verb
 FloatSwim
Pronunciation🇬🇧 /["/fləʊt/","/fləʊts/","/ˈfləʊtɪd/","/ˈfləʊtɪŋ/"]/🇺🇸 /["/fləʊt/","/fləʊts/","/ˈfləʊtɪd/","/ˈfləʊtɪŋ/"]/🇬🇧 /["/swɪm/","/swɪmz/","/swæm/","/swʌm/","/ˈswɪmɪŋ/"]/🇺🇸 /["/swɪm/","/swɪmz/","/swæm/","/swʌm/","/ˈswɪmɪŋ/"]/
MeaningTo rest on the surface of a liquid or move lightly in the air.To move through water by using arms and legs.
ExampleThe boat began to float gently on the calm water.I love to swim in the ocean during the summer.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelB2A1
Part of speechverbverb
Collocationsgently, slowly, downstream, seem to, across, down, in, gently, slowly, downstream, seem to, across, down, in, gently, slowly, downstream, seem to, across, down, in, freely, allow something tostrongly, vigorously, well, can, know how to, learn (how) to, across, in, to, go swimming, strongly, vigorously, well, can, know how to, learn (how) to, across, in, to, go swimming, strongly, vigorously, well, can, know how to, learn (how) to, across, in, to, go swimming
Antonymssink, submergesink, drown
Common mistakesConfused with 'flot' which is not a word., Using 'float' incorrectly as a noun instead of a verb., Mispronouncing it as 'floot' instead of 'float'.Confusing 'swim' with 'swam' for present tense., Using 'swim' as a noun instead of 'swimming'., Mixing up the prepositions used with 'swim' in phrases like 'swim in water'.
Usage notesOften used when describing how objects behave in water or how something moves lightly in the wind. Not used in formal writing when discussing serious topics.Commonly used in both formal and informal contexts. Generally inappropriate in a metaphorical sense unless used in idioms.

Frequently asked questions: Float vs Swim

What's the difference between Float and Swim?

Float: To rest on the surface of a liquid or move lightly in the air. Swim: To move through water by using arms and legs.

Which is more advanced: Float and Swim?

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

Are Float and Swim the same CEFR level?

Float: B2, Swim: A1 on the CEFR scale.

What part of speech are Float and Swim?

Float: verb, Swim: verb.

Can you show an example of each?

Float: The boat began to float gently on the calm water. Swim: I love to swim in the ocean during the summer.

Can I use Float and Swim interchangeably?

Not always. Float and Swim 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.