call for vs need

call for is not a noun while need is a noun.

Word	Noun	Adjective	Verb	Adverb
call for	No	No	Yes	No
need	Yes	No	Yes	No

As verbs, call for and need are synonyms defined as:

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

call for (noun)	need (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

call for (verb)	need (verb)
request the participation or presence of	have need of
express the need or desire for	have or feel a need for
gather or collect	require as useful, just, or proper
require as useful, just, or proper