As adjectives the difference between unthrift and unthrifty
is that unthrift is unthrifty while unthrifty is not thrifty.
As a noun unthrift
is a lack of thriftiness; prodigality.
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 [...].
unthrifty
English
Adjective
(er)
Not thrifty.