deficiency vs demand

deficiency and demand both are nouns.

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

As nouns, demand is a hypernym of deficiency; that is, demand is a word with a broader meaning than deficiency:

Other hypernyms of deficiency include need.

deficiency (noun)	demand (noun)
lack of an adequate quantity or number	the act of demanding
the state of needing something that is absent or unavailable	required activity
	an urgent or peremptory request
	the ability and desire to purchase goods and services
	a condition requiring relief

deficiency (verb)	demand (verb)
	request urgently and forcefully
	claim as due or just
	summon to court
	ask to be informed of
	lay legal claim to
	require as useful, just, or proper