As nouns the difference between spendthrift and unthrift
is that spendthrift is someone who spends money improvidently or wastefully while unthrift is a lack of thriftiness; prodigality.
As adjectives the difference between spendthrift and unthrift
is that spendthrift is wasteful, improvident or profligate while unthrift is unthrifty.
spendthrift
English
Noun
(
en noun)
Someone who spends money improvidently or wastefully.
Synonyms
* See also
Derived terms
* spendthrift trust
Adjective
(
en adjective)
Wasteful, improvident or profligate.
Lavish or extravagant.
unthrift
English
Noun
(
en noun)
A lack of thriftiness; prodigality.
Someone who is not thrifty; a spendthrift, someone who is not careful with their money.
*1633 , John Donne, "The Autumnall":
*:But name not Winter-faces , whose skin's slacke; / Lanke, as an unthrifts purse [...].