ask vs necessitate

ask and necessitate both are verbs.

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

As verbs, ask and necessitate are synonyms defined as:

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

ask (verb)	necessitate (verb)
make a request or demand for something to somebody	require as useful, just, or proper
direct or put; seek an answer to	cause to be a concomitant
address a question to and expect an answer from
consider obligatory; request and expect
require or ask for as a price or condition
make a date
require as useful, just, or proper