Fantastic vs That'd be the bomb

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

Fantastic

Top 2,000 (common)A1adjective

That'd be the bomb

SlangTop 5,000 (fairly common)
Most formal: FantasticMost common: Fantastic
 FantasticThat'd be the bomb
Pronunciation🇬🇧 /["/fænˈtæstɪk/"]/🇺🇸 /["/fænˈtæstɪk/"]/🇬🇧 //ðæt wəd bi ðə bɒm//🇺🇸 //ðæt wəd bi ðə bɑm//
MeaningReally great or awesome.That would be great or amazing.
ExampleThe movie was absolutely fantastic and I enjoyed every moment of it.Going to that concert would be the bomb!
RegisterNeutralSlang
How commonTop 2,000 (common)Top 5,000 (fairly common)
CEFR levelA1-
Part of speechadjective
Collocationsbe, feel, look, really, truly, utterly, be, look, seem, ratherthat'd be the bomb, sounds like it’d be the bomb
Antonymsterrible, awful, badThat'd be terrible, That'd be awful, That'd be horrible
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.Used in formal conversations., Confused with 'that'll be the bomb' which is incorrect., Said too seriously, it should be light-hearted.
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 informally to express excitement. Avoid in formal settings and professional contexts.

See it in real clips

Fantastic
That'd be the bomb

Frequently asked questions: Fantastic vs That'd be the bomb

What's the difference between Fantastic and That'd be the bomb?

Fantastic: Really great or awesome. That'd be the bomb: That would be great or amazing.

Which is more formal: Fantastic and That'd be the bomb?

Fantastic is the most formal of these.

Which is more common: Fantastic and That'd be the bomb?

Fantastic 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. That'd be the bomb: Going to that concert would be the bomb!

Can I use Fantastic and That'd be the bomb interchangeably?

Not always. Fantastic and That'd be the bomb 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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