Expend is more formal, and implies spending for some definite and (usually) sensible or worthy object: to expend most of one's salary on necessities. Squander suggests lavish, wasteful, or foolish expenditure: to squander a legacy.
Eric Benét (featuring Tamia) - Spend My Life With You
What kind of word is spend?
Firstly the word 'spend' is used as a verb which means to pay out money or use up time to do something, for example, 'Please spend some time reading books. ' Here, 'spend' is used to mean to use or devote time for reading books. The word 'spend' is the present base form of the verb itself.
[Middle English spenden, partly from Old English -spendan (from Latin expendēre, to expend; see EXPEND) and partly from Old French despendre, to weigh out; see DISPENSE.]
If someone spends a lot of money on something that he or she wants but does not need, you can use the verb splurge. We've just splurged on new kitchen appliances. If someone spends a lot of money on something that seems like a waste of money, in informal contexts you can use the verb blow.
Sound it Out: Break down the word 'money well spent' into its individual sounds "mun" + "ee wel spent". Say these sounds out loud, exaggerating them at first. Practice until you can consistently produce them clearly.