Fantastic vs Really great

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

Fantastic

Top 2,000 (common)A1adjective

Really great

InformalTop 1,000 (very common)
Most formal: FantasticMost common: Really great
 FantasticReally great
Pronunciation🇬🇧 /["/fænˈtæstɪk/"]/🇺🇸 /["/fænˈtæstɪk/"]/🇬🇧 //ˈrɪəli ɡreɪt//🇺🇸 //ˈrɪli ɡreɪt//
MeaningReally great or awesome.Very good or excellent.
ExampleThe movie was absolutely fantastic and I enjoyed every moment of it.The movie was really great and I enjoyed every minute of it.
RegisterNeutralInformal
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelA1-
Part of speechadjective
Collocationsbe, feel, look, really, truly, utterly, be, look, seem, ratherreally great time, really great job, really great meal, really great news
Antonymsterrible, awful, bad-
Common mistakesUsing 'fantastic' to describe negative things, which is incorrect., Mixing up 'fantastic' with 'fantastical', which means imaginary or whimsical., Think it's only for extraordinary situations; it can also be used for nice, everyday experiences.Using it in a formal context, like a business email., Confusing it with just 'great' which might sound too neutral., Using it with negative sentences, e.g. 'It's not really great.'
Usage notesUse 'fantastic' in everyday conversation to express that something is very good. It's appropriate for most contexts but can feel overly enthusiastic in formal writing.Used in casual conversation to emphasize positivity. Not suitable for formal written language.

See it in real clips

Fantastic
Really great

Frequently asked questions: Fantastic vs Really great

What's the difference between Fantastic and Really great?

Fantastic: Really great or awesome. Really great: Very good or excellent.

Which is more formal: Fantastic and Really great?

Fantastic is the most formal of these.

Which is more common: Fantastic and Really great?

Really great is the most common in everyday English.

Can you show an example of each?

Fantastic: The movie was absolutely fantastic and I enjoyed every moment of it. Really great: The movie was really great and I enjoyed every minute of it.

Can I use Fantastic and Really great interchangeably?

Not always. Fantastic and Really great 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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