Cool MateNecessity vs Requirement
When to use each in English, with meaning, register, and examples.
Necessity
Top 2,000 (common)B2noun
Requirement
Top 1,000 (very common)B2noun
Most common: Requirement
| Necessity | Requirement | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/nəˈsesəti/"]/🇺🇸 /["/nəˈsesəti/"]/ | 🇬🇧 /["/rɪˈkwaɪəmənt/"]/🇺🇸 /["/rɪˈkwaɪərmənt/"]/ |
| Meaning | Something very important or needed. | Something you need or must have. |
| Example | Food and water are basic necessities for survival. | The job listing stated that a degree in engineering is a requirement for applicants. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 1,000 (very common) |
| CEFR level | B2 | B2 |
| Part of speech | noun | noun |
| Collocations | absolute, fundamental, sheer, become, recognize, see, arise, dictate (something), require (something), of necessity, out of necessity, through necessity, any necessity, no necessity, absolute, vital, real, have, lack, a necessity of life, absolute, fundamental, sheer, become, recognize, see, arise, dictate (something), require (something), of necessity, out of necessity, through necessity, any necessity, no necessity | absolute, necessary, core, have, comply with, fit, for your requirement, to your requirement, requirement for, subject to the requirements (of something), surplus to requirements, absolute, necessary, core, have, comply with, fit, for your requirement, to your requirement, requirement for, subject to the requirements (of something), surplus to requirements |
| Antonyms | luxury, option, extravagance | option, choice, voluntary |
| Common mistakes | Confused with 'accessory' - thinking necessity means unimportant., Using 'necessity' as a verb instead of a noun., Incorrectly pluralizing 'necessity' to 'necessities' in non-count situations. | Confused with 'require' — remember it's a noun, not a verb., Omitting articles — 'a requirement' instead of 'requirement'., Using 'requirements' mistakenly with plural agreements when singular is needed. |
| Usage notes | Use 'necessity' when discussing something essential, especially in formal contexts. Avoid using it in casual conversations where simpler words like 'need' might be more appropriate. | Use 'requirement' in professional and educational contexts. Avoid using it in casual conversation unless necessary. |
Frequently asked questions: Necessity vs Requirement
What's the difference between Necessity and Requirement?
Necessity: Something very important or needed. Requirement: Something you need or must have.
Which is more common: Necessity and Requirement?
Requirement is the most common in everyday English.
Are Necessity and Requirement the same CEFR level?
Necessity: B2, Requirement: B2 on the CEFR scale.
What part of speech are Necessity and Requirement?
Necessity: noun, Requirement: noun.
Can you show an example of each?
Necessity: Food and water are basic necessities for survival. Requirement: The job listing stated that a degree in engineering is a requirement for applicants.
Can I use Necessity and Requirement interchangeably?
Not always. Necessity and Requirement 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.