Cannabis vs Marijuana vs Weed

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

Cannabis

Top 2,000 (common)

Marijuana

InformalTop 2,000 (common)

Weed

InformalTop 2,000 (common)C1noun
Most formal: Cannabis
 CannabisMarijuanaWeed
Pronunciation🇬🇧 //ˈkæn.ə.bɪs//🇺🇸 //ˈkæn.ə.bɪs//🇬🇧 //ˌmærɪˈdʒuːənə//🇺🇸 //ˌmɛrəˈwɑːnə//🇬🇧 /["/wiːd/"]/🇺🇸 /["/wiːd/"]/
MeaningA plant used for medicine and to make drugs.A plant often used for its effects as a drug.A type of plant that people can use for drugs.
ExampleCannabis is used to treat certain medical conditions.Many people use marijuana for its relaxing effects.The yard was overgrown with weeds.
RegisterNeutralInformalInformal
How commonTop 2,000 (common)Top 2,000 (common)Top 2,000 (common)
CEFR level--C1
Part of speechnoun
Collocationscannabis plant, cannabis oil, cannabis usesmoke marijuana, marijuana use, legalize marijuana, marijuana effects, marijuana ediblesannual, perennial, aquatic, kill, clear, get rid of, grow, spread, spring up, control, killer, trimmer
Antonymsnoneconventional drug, stimulantmedicine, treatment
Common mistakesConfused with 'hemp', which is a different, non-psychoactive variety., Omitting context when discussing its legality., Using slang terms in formal situations.Confused with 'hemp' - hemp has different legal uses., Using 'marijuana' when, technically, 'cannabis' is more accurate in formal contexts.Confused with 'weeds' (unwanted plants)., Using as a verb instead of a noun., Mispronouncing it, especially emphasizing the second 'e'.
Usage notesUsed in discussions about medicine, legality, and recreational use. Avoid in formal settings unless discussing legality or health.Generally used in informal contexts. In formal discussions, refer to 'cannabis'. Consider cultural sensitivities surrounding its use.Often used in casual conversation among friends. Avoid using in formal settings or when discussing serious topics like health. Context matters, as 'weed' can be a slang term for cannabis.

Frequently asked questions: Cannabis vs Marijuana vs Weed

What's the difference between Cannabis, Marijuana, and Weed?

Cannabis: A plant used for medicine and to make drugs. Marijuana: A plant often used for its effects as a drug. Weed: A type of plant that people can use for drugs.

Which is more formal: Cannabis, Marijuana, and Weed?

Cannabis is the most formal of these.

Can you show an example of each?

Cannabis: Cannabis is used to treat certain medical conditions. Marijuana: Many people use marijuana for its relaxing effects. Weed: The yard was overgrown with weeds.

Can I use Cannabis, Marijuana, and Weed interchangeably?

Not always. Cannabis, Marijuana, and Weed 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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