What is another word for "need"?

Roget's Thesaurus (1911) lists these synonyms for "need": abettor, able, absorbing, accessory, accomplice, acquaintance, adherent, adjunct, adjutant, adjuvant, advocate, after, all, ally, alter, ambo, amigo, and, angel, aruspex, aruspice, ask, assistant, associate, astrologer, augur, auxiliary, backer, bedfellow, best, boon, bosom, call, candle, cannot, case, casual, chamber, champion, charge.