compel vs require

compel and require both are verbs.

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

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

Other hypernyms of compel include ask, call for, demand, involve, necessitate, need, postulate, take.

compel (verb)	require (verb)
force somebody to do something	make someone do something
necessitate or exact	consider obligatory; request and expect
	have need of
	require as useful, just, or proper