1. essential, necessary, necessity, requirement, requisite

anything indispensable

Example Sentences:
'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

• essential
• necessary
• necessity
• requirement

2. needed, needful, required, requisite

necessary for relief or supply

Example Sentences:
'provided them with all things needful'

Synonyms

• needed
• needful
• required