simpleness vs restraint

simpleness and restraint both are nouns.

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

As nouns, simpleness and restraint are synonyms defined as:

Other synonyms of simpleness include chasteness, simplicity.

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