Synonyms for Demand (same or very similar meaning)
WordNet sense 1 (a condition requiring relief):
needWordNet sense 2 (required activity):
requirementWordNet sense 3 (require as useful, just, or proper):
ask, involve, necessitate, postulate, take, require, postulate, call forWordNet sense 4 (claim as due or just):
exactFrom the ODE community, based on WordNetadd/edit