"deficiencies" in the noun sense
1. 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"
2. insufficiency, inadequacy, deficiency
lack of an adequate quantity or number
"the inadequacy of unemployment benefits"
Source: WordNet® (An amazing lexical database of English)
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