RichThesaurus
harum-scarum
vs
subitaneous
harum-scarum
noun
A giddy, rash person.
adv
wildly, carelessly, irresponsibly
adj
wild, careless, irresponsible
subitaneous
How often have the words
harum-scarum
and
subitaneous
occurred in a corpus of books?
(source:
Google Ngram Viewer
)