RichThesaurus
heedless (of)
vs
nonplussed
heedless (of)
nonplussed
adj
Unsure how to act or respond; bewildered, perplexed.
Unaffected, unfazed; unimpressed.
How often have the words
heedless (of)
and
nonplussed
occurred in a corpus of books?
(source:
Google Ngram Viewer
)