As an adjective sedate
is in a composed and temperate state.
As a verb sedate
is to tranquilize by giving a sedative; to calm; to soothe; to induce sleep.
As a proper noun serenity is
in general use since the 1990s.
Other Comparisons: What's the difference?
to tranquilize by giving a sedative; to calm; to soothe; to induce sleep.
The state of being serene; calmness; peacefulness.
A lack of agitation or disturbance.
A title given to a reigning prince or similar dignitary.
* tranquility / tranquillity
* Serene Highness