Meaning : Anything indispensable.
							Example : 
							Food and shelter are necessities of life.
							The essentials of the good life.
							Allow farmers to buy their requirements under favorable conditions.
							A place where the requisites of water fuel and fodder can be obtained.
							
Synonyms : necessary, necessity, requirement, requisite
Meaning : Absolutely necessary. Vitally necessary.
							Example : 
							Essential tools and materials.
							Funds essential to the completion of the project.
							An indispensable worker.
							
Synonyms : indispensable
Meaning : Basic and fundamental.
							Example : 
							The essential feature.
							
Meaning : Of the greatest importance.
							Example : 
							The all-important subject of disarmament.
							Crucial information.
							In chess cool nerves are of the essence.
							
Synonyms : all important, all-important, crucial, of the essence
Meaning : Being or relating to or containing the essence of a plant etc.
							Example : 
							Essential oil.
							
Meaning : Defining rights and duties as opposed to giving the rules by which rights and duties are established.
							Example : 
							Substantive law.
							
Synonyms : substantive
Relating to court practice and procedure as opposed to the principles of law.
Adjective law.