restraint vs simpleness

restraint and simpleness both are nouns.

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

As nouns, restraint and simpleness are synonyms defined as:

Other synonyms of restraint include chasteness, simplicity.

restraint (noun)	simpleness (noun)
the act of controlling by restraining someone or something	the quality of being simple or uncompounded
a device that retards something's motion	lack of ornamentation
discipline in personal and social activities	freedom from difficulty or hardship or effort
lack of ornamentation	a lack of penetration or subtlety
a rule or condition that limits freedom
the state of being physically constrained