The word 'wast want' can be synonymous with the word 'needless'. They both imply an absence of necessity or excess, whether it be regarding resources, desires or emotions. Other synonymous words may include "superfluous", "unnecessary", or "surplus". When used in the context of wasteful spending, "extravagant" or "profligate" may be applicable synonyms. Meanwhile, when referring to a lack of demand or need, options such as "unneeded", "obsolete" or "redundant" may work. It's important to consider the intended context when selecting a synonym for 'wast want', which can aid in clarity and understanding.