Entail vs Require

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

Entail

Formal Top 3,000 (common) B1

Require

Top 1,000 (very common) B1 verb

Most formal: Entail Most common: Require

	Entail	Require
Pronunciation	🇬🇧 //ɪnˈteɪl// 🇺🇸 //ɪnˈteɪl// Hear Entail	🇬🇧 /["/rɪˈkwaɪə(r)/","/rɪˈkwaɪəz/","/rɪˈkwaɪəd/","/rɪˈkwaɪərɪŋ/"]/ 🇺🇸 /["/rɪˈkwaɪər/","/rɪˈkwaɪərz/","/rɪˈkwaɪərd/","/rɪˈkwaɪərɪŋ/"]/ Hear Require
Meaning	to involve or include something as a necessary part	to need something or someone for a purpose
Example	The project will entail several phases of development.	The project will require a significant amount of time to complete.
Register	Formal	Neutral
How common	Top 3,000 (common)	Top 1,000 (very common)
CEFR level	B1	B1
Part of speech		verb
Collocations	entail risks, entail costs, entail consequences	urgently, reasonably, generally, urgently, reasonably, generally
Antonyms	exclude, omit, remove	deny, refuse, forbid
Common mistakes	Confused with 'contail' — no such word exists., Using it in informal contexts where simpler words are better., Incorrectly stating 'entail of' instead of 'entail'.	'Require' is sometimes confused with 'request'; they have different meanings., Learners might use 'require' without an object, which is incorrect., 'Require' is often mixed up with 'want', but 'require' implies necessity.
Usage notes	Used mainly in academic and formal contexts. Avoid in casual conversation.	Use 'require' when talking about needs in formal settings, such as requirements for a job or project. Avoid in casual conversation unless discussing responsibilities.

Frequently asked questions: Entail vs Require

What's the difference between Entail and Require?

Entail: to involve or include something as a necessary part Require: to need something or someone for a purpose

Which is more formal: Entail and Require?

Entail is the most formal of these.

Which is more common: Entail and Require?

Require is the most common in everyday English.

Are Entail and Require the same CEFR level?

Entail: B1, Require: B1 on the CEFR scale.

Can I use Entail and Require interchangeably?

Not always. Entail and Require 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.