Nourish vs Sustain

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

Nourish

Top 5,000 (fairly common) C2 verb

Sustain

Top 2,000 (common) C1 verb

Most common: Sustain

	Nourish	Sustain
Pronunciation	🇬🇧 //ˈnɔːrɪʃ// 🇺🇸 //ˈnɔːrɪʃ//	🇬🇧 /["/səˈsteɪn/","/səˈsteɪnz/","/səˈsteɪnd/","/səˈsteɪnɪŋ/"]/ 🇺🇸 /["/səˈsteɪn/","/səˈsteɪnz/","/səˈsteɪnd/","/səˈsteɪnɪŋ/"]/
Meaning	To provide food or nutrients to help someone or something grow.	To keep something going or maintain it.
Example	It is essential to nourish your body with healthy foods.	We must find ways to sustain our natural resources for the future.
Register	Neutral	Neutral
How common	Top 5,000 (fairly common)	Top 2,000 (common)
CEFR level	C2	C1
Part of speech	verb	verb
Collocations	nourish the body, nourish the mind, nourish relationships, nourish a community, nourish plants	no longer, barely, indefinitely, be able to, can, be unable to
Antonyms	starve, deprive, neglect	neglect, abandon, cease
Common mistakes	Confusing nourish with just feed; nourish implies a deeper level of care., Using nourish intransitively; nourish must have an object., Not using it in metaphorical contexts, where it can mean supporting development emotionally or intellectually.	'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 notes	Used in both literal and metaphorical contexts. Suitable for formal writing, but also common in everyday conversation when talking about food or emotional support.	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.

See it in real clips

"And I might share with you some words which have sustained me

Sherlock › S1 E1

Impossible to sustain a smoking habit in London these days.

There's not a planet in our solar system that could sustain life...

"And I might share with you some words which have sustained me

Sherlock › S1 E1

Impossible to sustain a smoking habit in London these days.

Sustain

Frequently asked questions: Nourish vs Sustain

What's the difference between Nourish and Sustain?

Nourish: To provide food or nutrients to help someone or something grow. Sustain: To keep something going or maintain it.

Which is more common: Nourish and Sustain?

Sustain is the most common in everyday English.

Which is more advanced: Nourish and Sustain?

Nourish is the highest level, at C2, on the CEFR scale.

Are Nourish and Sustain the same CEFR level?

Nourish: C2, Sustain: C1 on the CEFR scale.

What part of speech are Nourish and Sustain?

Nourish: verb, Sustain: verb.

Can you show an example of each?

Nourish: It is essential to nourish your body with healthy foods. Sustain: We must find ways to sustain our natural resources for the future.

Can I use Nourish and Sustain interchangeably?

Not always. Nourish 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.