need vs require

need is a noun but require is not a noun.

Word	Noun	Adjective	Verb	Adverb
need	Yes	No	Yes	No
require	No	No	Yes	No

As verbs, need and require are synonyms defined as:

Other synonyms of need include want.

As verbs, need and require are synonyms defined as:

Other synonyms of need include ask, call for, demand, involve, necessitate, postulate, take.

need (noun)	require (noun)
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
anything that is necessary but lacking
a condition requiring relief
a state of extreme poverty or destitution

need (verb)	require (verb)
have need of	make someone do something
have or feel a need for	consider obligatory; request and expect
require as useful, just, or proper	have need of
	require as useful, just, or proper