Allegedly vs Reportedly vs Supposedly

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

Allegedly

Top 2,000 (common)C1adverb

Reportedly

Top 5,000 (fairly common)C1adverb

Supposedly

Top 3,000 (common)C1adverb
Most common: Allegedly
 AllegedlyReportedlySupposedly
Pronunciation🇬🇧 /["/əˈledʒɪdli/"]/🇺🇸 /["/əˈledʒɪdli/"]/🇬🇧 /["/rɪˈpɔːtɪdli/"]/🇺🇸 /["/rɪˈpɔːrtɪdli/"]/🇬🇧 /["/səˈpəʊzɪdli/"]/🇺🇸 /["/səˈpəʊzɪdli/"]/
MeaningIt is said that something is true, but it hasn't been proven.It is said that something is true, but not confirmed.Something is believed to be true, but it may not be.
Examplecrimes allegedly committed during the warThe band have reportedly decided to split up.The novel is supposedly based on a true story.
RegisterNeutralNeutralNeutral
How commonTop 2,000 (common)Top 5,000 (fairly common)Top 3,000 (common)
CEFR levelC1C1C1
Part of speechadverbadverbadverb
Collocationsallegedly involved, allegedly committed, allegedly stated, allegedly seen, allegedly linkedreportedly confirmed, reportedly involved, reportedly statedsupposedly true, supposedly said, supposedly happening, supposedly planned, supposedly proven
Antonymsundeniably, certainly, definitely, unquestionablyunconfirmedly, anecdotally, allegedly notactually, definitely, certainly
Common mistakesUsing it in informal contexts where a more casual phrase would be better., Confusing it with 'allegation', which is a noun., Misplacing it in a sentence, often using it before the subject instead of before the verb.Confused with 'reported' vs 'reportedly', Using it in informal settings where a simpler word would be better, Incorrectly placing it before the subject instead of the verb'Supposedly' vs 'supposably' confusion., Using 'supposedly' in overly formal contexts., Misplacing 'supposedly' within a sentence.
Usage notesUse 'allegedly' when reporting accusations or claims that are not confirmed. It's common in news articles but less so in casual conversations.Use 'reportedly' to indicate that information comes from another source and may not be verified. It's more appropriate in formal contexts, like news articles, rather than casual conversation.Use 'supposedly' when describing something that is commonly accepted but may not be true. It's neutral and generally suitable in both spoken and written contexts, but avoid in informal conversations.

See it in real clips

Supposedly

Frequently asked questions: Allegedly vs Reportedly vs Supposedly

What's the difference between Allegedly, Reportedly, and Supposedly?

Allegedly: It is said that something is true, but it hasn't been proven. Reportedly: It is said that something is true, but not confirmed. Supposedly: Something is believed to be true, but it may not be.

Which is more common: Allegedly, Reportedly, and Supposedly?

Allegedly is the most common in everyday English.

Are Allegedly, Reportedly, and Supposedly the same CEFR level?

Allegedly: C1, Reportedly: C1, Supposedly: C1 on the CEFR scale.

What part of speech are Allegedly, Reportedly, and Supposedly?

Allegedly: adverb, Reportedly: adverb, Supposedly: adverb.

Can you show an example of each?

Allegedly: crimes allegedly committed during the war Reportedly: The band have reportedly decided to split up. Supposedly: The novel is supposedly based on a true story.

Can I use Allegedly, Reportedly, and Supposedly interchangeably?

Not always. Allegedly, Reportedly, and Supposedly 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.