require vs demand

require is not a noun while demand is a noun.

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

As verbs, demand is a hypernym of require; that is, demand is a word with a broader meaning than require:

As verbs, require and demand are synonyms defined as:

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

require (noun)	demand (noun)
	the act of demanding
	required activity
	an urgent or peremptory request
	the ability and desire to purchase goods and services
	a condition requiring relief

require (verb)	demand (verb)
make someone do something	request urgently and forcefully
consider obligatory; request and expect	claim as due or just
have need of	summon to court
require as useful, just, or proper	ask to be informed of
	lay legal claim to
	require as useful, just, or proper