Conserve vs Maintain vs Preserve vs Save vs Sustain

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

Conserve

Top 2,000 (common)C1verb

Maintain

Top 2,000 (common)B2verb

Preserve

Top 2,000 (common)B2verb

Save

Top 1,000 (very common)A2verb

Sustain

Top 2,000 (common)C1verb
Most common: Save
 ConserveMaintainPreserveSaveSustain
Pronunciation🇬🇧 /["/kənˈsɜːv/","/kənˈsɜːvz/","/kənˈsɜːvd/","/kənˈsɜːvɪŋ/"]/🇺🇸 /["/kənˈsɜːrv/","/kənˈsɜːrvz/","/kənˈsɜːrvd/","/kənˈsɜːrvɪŋ/"]/🇬🇧 //meɪnˈteɪn//🇺🇸 //meɪnˈteɪn//🇬🇧 //prɪˈzɜːv//🇺🇸 //prɪˈzɝːv//🇬🇧 /["/seɪv/","/seɪvz/","/seɪvd/","/ˈseɪvɪŋ/"]/🇺🇸 /["/seɪv/","/seɪvz/","/seɪvd/","/ˈseɪvɪŋ/"]/🇬🇧 /["/səˈsteɪn/","/səˈsteɪnz/","/səˈsteɪnd/","/səˈsteɪnɪŋ/"]/🇺🇸 /["/səˈsteɪn/","/səˈsteɪnz/","/səˈsteɪnd/","/səˈsteɪnɪŋ/"]/
MeaningTo save or keep something safe, especially resources like water or energy.To keep something in good condition or continue to have it.To keep something safe from harm or change.To keep something safe or to stop it from being lost or damaged.To keep something going or maintain it.
Examplenew laws to conserve wildlife in the areaTo maintain a healthy lifestyle, you should exercise regularly.We need to preserve our natural resources for future generations.I need to save my homework before I shut down the computer.We must find ways to sustain our natural resources for the future.
RegisterNeutralNeutralNeutralNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)Top 2,000 (common)Top 1,000 (very common)Top 2,000 (common)
CEFR levelC1B2B2A2C1
Part of speechverbverbverbverbverb
Collocationsconserve energy, conserve water, conserve resources, conserve wildlife, conserve natural habitatsmaintain order, maintain balance, maintain standards, maintain equipmentpreserve food, preserve nature, preserve culture, preserve the environmentsingle-handedly, possibly, potentially, be able to, can, be unable to, from, an attempt to save something, an effort to save something, a battle to save something, up, look to, try to, manage to, for, on, scrimp and save, thereby saving, up, look to, try to, manage to, for, on, scrimp and save, thereby saving, brilliantly, superbly, bravelyno longer, barely, indefinitely, be able to, can, be unable to
Antonymswaste, deplete, squanderneglect, abandon, discontinuedestroy, neglect, wastewaste, lose, spendneglect, abandon, cease
Common mistakesConfused with 'conserve' vs 'preserve', Using 'conserve' with inanimate objects incorrectly, Incorrect verb tense, e.g., saying 'conserves water' when referring to past actionsConfused with 'mainten' which is not a word., Using 'maintain' with uncountable nouns incorrectly., Omitting the object when using it in a sentence.Confused with 'conserve' which has a more restricted meaning., Using 'preserve' with uncountable nouns incorrectly., Misplacing 'preserve' in sentences, especially in passive forms.Confused with 'safety' - 'save' is a verb, while 'safety' is a noun., Using 'save' without an object - always specify what is being saved., Misusing 'saving' as an adjective - it should be used as a verb.'Sustain' is often confused with 'sustained' as a past form., Learners sometimes forget to add an object after 'sustain'., 'Sustain' is misused when referring to temporary situations, instead of ongoing support.
Usage notesUsed in environmental contexts, such as conservation of water or wildlife. More appropriate in formal discussions about sustainability. Avoid using in casual conversation unless discussing serious topics.Used in contexts involving care, upkeep, or support. Appropriate in both spoken and written English but varies from technical discussions to daily conversation.Used to indicate the act of maintaining something in its original state. Often used in environmental and culinary contexts. Avoid informal settings.Used in various contexts, including financial savings, rescuing someone, or preserving information. It's appropriate for everyday conversation, while in formal writing, alternatives like 'preserve' might be more suitable.Use 'sustain' in contexts about keeping something alive or supporting it over time. It can be formal when discussing topics like environmental issues or less formal in conversations about personal interests.

Frequently asked questions: Conserve vs Maintain vs Preserve vs Save vs Sustain

What's the difference between Conserve, Maintain, Preserve, Save, and Sustain?

Conserve: To save or keep something safe, especially resources like water or energy. Maintain: To keep something in good condition or continue to have it. Preserve: To keep something safe from harm or change. Save: To keep something safe or to stop it from being lost or damaged. Sustain: To keep something going or maintain it.

Which is more common: Conserve, Maintain, Preserve, Save, and Sustain?

Save is the most common in everyday English.

Are Conserve, Maintain, Preserve, Save, and Sustain the same CEFR level?

Conserve: C1, Maintain: B2, Preserve: B2, Save: A2, Sustain: C1 on the CEFR scale.

What part of speech are Conserve, Maintain, Preserve, Save, and Sustain?

Conserve: verb, Maintain: verb, Preserve: verb, Save: verb, Sustain: verb.

Can you show an example of each?

Conserve: new laws to conserve wildlife in the area Maintain: To maintain a healthy lifestyle, you should exercise regularly. Preserve: We need to preserve our natural resources for future generations. Save: I need to save my homework before I shut down the computer. Sustain: We must find ways to sustain our natural resources for the future.

Can I use Conserve, Maintain, Preserve, Save, and Sustain interchangeably?

Not always. Conserve, Maintain, Preserve, Save, and Sustain 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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