lack, deficiency, want -- (the state of needing something that is absent or unavailable; "there is a serious lack of insight into the problem"; "water is the critical deficiency in desert regions"; "for want of a nail the shoe was lost")
need, want -- (anything that is necessary but lacking; "he had sufficient means to meet his simple needs"; "I tried to supply his wants")
wish, wishing, want -- (a specific feeling of desire; "he got his wish"; "he was above all wishing and desire")
Overview of verb want
The verb want has 5 senses
desire, want -- (feel or have a desire for; want strongly; "I want to go home now"; "I want my own room")
want, need, require -- (have need of; "This piano wants the attention of a competent tuner")
want -- (hunt or look for; want for a particular reason; "Your former neighbor is wanted by the FBI"; "Uncle Sam wants you")
want -- (wish or demand the presence of; "I want you here at noon!")
want -- (be without, lack; be deficient in; "want courtesy"; "want the strength to go on living"; "flood victims wanting food and shelter")