Require vs. Need

Difference Between Require and Need
Requireverb
(obsolete) To ask (someone) for something; to request.
Neednoun
A requirement for something; something needed.
There's no need to speculate; we can easily find out for sure.She grew irritated with his constant need for attention.Our needs are not being met.I've always tried to have few needs beyond food, clothing and shelter.Requireverb
To demand, to insist upon (having); to call for authoritatively.
Neednoun
Lack of means of subsistence; poverty; indigence; destitution.
Requireverb
Naturally to demand (something) as indispensable; to need, to call for as necessary.
Needverb
(transitive) To have an absolute requirement for.
Living things need water to survive.Requireverb
To demand of (someone) to do something.
Needverb
(transitive) To want strongly; to feel that one must have something.
After ten days of hiking, I needed a shower and a shave.Requireverb
require as useful, just, or proper;
It takes nerve to do what she didsuccess usually requires hard workThis job asks a lot of patience and skillThis position demands a lot of personal sacrificeThis dinner calls for a spectacular dessertThis intervention does not postulates a patient's consentNeedverb
(modal verb) To be obliged or required (to do something).
You need not go if you don't want to.Requireverb
consider obligatory; request and expect;
We require our secretary to be on timeAren't we asking too much of these children?I expect my students to arrive in time for their lessonsNeedverb
(intransitive) To be required; to be necessary.
Requireverb
make someone do something
Needverb
To be necessary (to someone).
Requireverb
have need of;
This piano wants the attention of a competent tunerNeednoun
a condition requiring relief;
she satisfied his need for affectionGod has no need of men to accomplish His workthere is a demand for jobsNeednoun
anything that is necessary but lacking;
he had sufficient means to meet his simple needsI tried to supply his wantsNeednoun
the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior;
we did not understand his motivationhe acted with the best of motivesNeednoun
a state of extreme poverty or destitution;
their indigence appalled hima general state of need exists among the homelessNeedverb
require as useful, just, or proper;
It takes nerve to do what she didsuccess usually requires hard workThis job asks a lot of patience and skillThis position demands a lot of personal sacrificeThis dinner calls for a spectacular dessertThis intervention does not postulates a patient's consentNeedverb
have need of;
This piano wants the attention of a competent tunerNeedverb
have or feel a need for;
always needing friends and money