must, should, motivation, ought, motive, want, indigence, penury, necessitate, pauperism, more...

want, surplus, excess, abundance, plenty

physiological, safety, belonging, esteem, self-actualization, more...

urgent, great, little, real, human, desperate, most, immediate, dire, basic, financial

something needed,   employ; necessity,   a want,   be necessary,   cant live without,   have to have,   can't live without,   what is needed,   to lack,   name reid rhyme