involve vs require

involve and require both are verbs.

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

As verbs, involve and require are synonyms defined as:

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

involve (verb)	require (verb)
make complex or intricate or complicated	make someone do something
occupy or engage the interest of	consider obligatory; request and expect
have as a necessary feature	have need of
connect closely and often incriminatingly	require as useful, just, or proper
contain as a part
engage as a participant
require as useful, just, or proper