restraint vs moderation

restraint and moderation both are nouns.

Word	Noun	Adjective	Verb	Adverb
restraint	Yes	No	No	No
moderation	Yes	No	No	No

As nouns, moderation is a hyponym of restraint; that is, moderation is a word with a more specific, narrower meaning than restraint:

Other hyponyms of restraint include self-restraint, temperateness, temperance, inhibition, continence.

restraint (noun)	moderation (noun)
the act of controlling by restraining someone or something	the action of lessening in severity or intensity
a device that retards something's motion	quality of being moderate and avoiding extremes
discipline in personal and social activities	the trait of avoiding excesses
lack of ornamentation	a change for the better
a rule or condition that limits freedom
the state of being physically constrained