necessary

• "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

• necessitythe condition of being essential or indispensable ; anything indispensable
• essentialanything indispensable; absolutely necessary; basic and fundamental; of the greatest importance; being or relating to or containing the essence of a plant etc; defining rights and duties as opposed to giving the rules by which rights and duties are established
• requirementrequired activity; anything indispensable; something that is required in advance
• requisitenecessary for relief or supply; anything indispensable

• "the necessary consequences of one's actions"