need

[1]	require , demand , want , be in want of , call for , have need of/for , lack , miss , have occasion for
[2]	necessitate , ask , postulate , require , take , involve , call for , demand
[3]	want , require

[1]	demand
[2]	want , necessity , requirement , call , demand , constraint
[3]	essential , motivation , motive , necessary , requisite , prerequisite , necessity , basic , fundamental , necessary , desideratum
[4]	distress , indigence , penury , difficulty , trouble , pauperism , pauperization , (dire/desperate) straits , stress , emergency , exigency , extremity , neediness , needfulness , poverty , penury , impecuniousness , destitution , privation , deprivation , indigence , beggary
[5]	want , lack , dearth , shortage , paucity , scarcity , insufficiency , desideratum