The plural adds the usual "s" as "employees".
The correct spelling is deaconesses.
The plural form of 'rain', is 'rains'.
Finches.
Jobs.
The correct spelling of the musical instrument is kazoo.The plural form is kazoos.
The correct spelling of the plural of house is houses.
Without consulting the Queen, standard English usage is "employees".
That is the correct spelling of the plural noun "coverages" (usually insurance).
The plural form of party is "parties".
companies'
Histories is the correct spelling.
municipalities