required as in necessary for relief or supply

• "provided them with all things needful"

Synonyms

• needednecessary for relief or supply
• needfulnecessary for relief or supply
• requisitenecessary for relief or supply; anything indispensable

required as in required by rule

• "in most schools physical education is compulsory"
• "attendance is mandatory"
• "required reading"

Synonyms

• compulsoryrequired by rule
• mandatoryrequired by rule; the recipient of a mandate ; a territory surrendered by Turkey or Germany after World War I and put under the tutelage of some other European power until they are able to stand by themselves