Constant vs Ongoing

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

Constant

Top 2,000 (common)B2adjective

Ongoing

Top 2,000 (common)B2adjective
 ConstantOngoing
Pronunciation🇬🇧 /["/ˈkɒnstənt/"]/🇺🇸 /["/ˈkɑːnstənt/"]/🇬🇧 /["/ˈɒnɡəʊɪŋ/"]/🇺🇸 /["/ˈɑːnɡəʊɪŋ/"]/
MeaningSomething that stays the same and doesn't change.still happening; continuing.
ExampleShe is a constant source of inspiration for her team.an ongoing debate/discussion/process
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB2B2
Part of speechadjectiveadjective
Collocationsbe, remain, stay, fairly, reasonably, relatively, across, over, be, remain, stay, fairly, reasonably, relatively, across, overongoing project, ongoing discussion, ongoing debate, ongoing research, ongoing process
Antonymsvariable, changing, inconstantcompleted, finished, terminated
Common mistakes'Constant' confused with 'constant' meaning an unchanged quantity in mathematics., 'Constantly' used incorrectly as an adjective instead of adverb., 'Constants' misused in plural form when referring to singular concepts.Confusing 'ongoing' with 'on-going'., Using 'ongoing' in place of 'completed' or 'finished'.
Usage notesUse 'constant' when discussing something that remains unchanged over time. It can be used in both formal and informal contexts, but is often used in academic or scientific discussions.Use 'ongoing' to describe events or situations that are currently in progress. It’s usually appropriate in both written and spoken contexts, but can be less formal than legal or academic settings.

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Ongoing

Frequently asked questions: Constant vs Ongoing

What's the difference between Constant and Ongoing?

Constant: Something that stays the same and doesn't change. Ongoing: still happening; continuing.

Are Constant and Ongoing the same CEFR level?

Constant: B2, Ongoing: B2 on the CEFR scale.

What part of speech are Constant and Ongoing?

Constant: adjective, Ongoing: adjective.

Can you show an example of each?

Constant: She is a constant source of inspiration for her team. Ongoing: an ongoing debate/discussion/process

Can I use Constant and Ongoing interchangeably?

Not always. Constant and Ongoing 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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