One Word Substitution : Set 21

Animals which live in a  flock , used for human beings also	Gregarious/sociable
An act of separation from a person to avoid infection	Quarantine
Dress  with medals, ribbons worn at official ceremonies	Regalia
A thing kept in memory of an event	Souvenir
A place where animals are slaughtered for the market	Abattoir
The dwelling place if an animal underground	Borrow
A place where treasurers ,stores ,ammunition are hidden	Cache
A graveyard where dead are buried	Crèche
An original glass bottle for holding wine or other alcoholic drinks	Decanter
A squirrel’s home	Drey
A home for old people	Infirmary
A place for wild animals and birds	Menagerie
A house or shelter for a dog	Kennel
A place where pigs are kept	Sty
A case in which the blade of a sword is kept	Sheath ,Scabbard
A place where lather is tanned	Tannery
One who drives a motor car	Chauffeur