RichThesaurus
devil-may-care
vs
heedless
devil-may-care
adj
Carefree, reckless, irresponsible.
heedless
adj
Unaware; without noticing; careless; inattentive.
How often have the words
devil-may-care
and
heedless
occurred in a corpus of books?
(source:
Google Ngram Viewer
)