demand

求める(もとめる)	Demand OR ask for, also to seek. (Chinese students were seeking democracy). $$$

要求(ようきゅう)	Demand – more strident than 求める; you wouldn’t use it to mean ‘to ask or seek.’ $$$

需要(じゅよう)	A technical, economic word. Supply and demand. Increasing demand for petroleum.

請求(せいきゅう)	Demand for money – usually used only on invoices and bills.

欲求(よっきゅう)	Personal needs (love, shelter, food).