Placidity is a synonym of serenity.
As nouns the difference between serenity and placidity
is that serenity is the state of being serene; calmness; peacefulness while placidity is the state of being placid; peacefulness.
As a proper noun Serenity
is {{given name|female|from=English}} in general use since the 1990s.
serenity
English
Noun
(serenities)
The state of being serene; calmness; peacefulness.
A lack of agitation or disturbance.
A title given to a reigning prince or similar dignitary.
Synonyms
* sereneness
* tranquility / tranquillity
* harmony
* peace
; title
* Serene Highness
See also
*
placidity
English
Noun
(-)
The state of being placid; peacefulness.
Synonyms
* (state of being placid) composure, peacefulness, serenity
Related terms
* placid
* placidly
* placidness