Difference between Want and Deficiency

Want

Part of speech: noun

Definition: Lack (of), absence of. poverty

Part of speech: verb

Definition: to wish for or desire (something). To lack (something). To require (something).

Example sentence: If you want to be happy, be.

Deficiency

Part of speech: noun

Definition: Inadequacy or incompleteness.An insufficiency, especially of something essential to health.

Example sentence: Individuals fail to recognise how their perennial state of sleep deficiency has come to compromise their mental aptitude and physical vitality, including the slow accumulation of ill health.