restrain vs regulate

restrain and regulate both are verbs.

Word	Noun	Adjective	Verb	Adverb
restrain	No	No	Yes	No
regulate	No	No	Yes	No

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

restrain (verb)	regulate (verb)
prevent the action or expression of	fix or adjust the time, amount, degree, or rate of
to close within bounds, or otherwise limit or deprive of free movement	restrain the emission of (sound, fluid, etc.)
restrict (someone or something) so as to make free movement difficult	shape or influence; give direction to
prevent (someone or something) from doing something	bring into conformity with rules or principles or usage; impose regulations