demand vs ask

demand is a noun but ask is not a noun.

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

As verbs, ask is a hyponym of demand; that is, ask is a word with a more specific, narrower meaning than demand:

Other hyponyms of demand include want, expect, require, clamor, clamour, dun.

As verbs, demand and ask are synonyms defined as:

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

demand (noun)	ask (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

demand (verb)	ask (verb)
request urgently and forcefully	make a request or demand for something to somebody
claim as due or just	direct or put; seek an answer to
summon to court	address a question to and expect an answer from
ask to be informed of	consider obligatory; request and expect
lay legal claim to	require or ask for as a price or condition
require as useful, just, or proper	make a date
	require as useful, just, or proper