RichThesaurus
Argus-eyed
vs
cagey
Argus-eyed
adj
ever vigilant
cagey
adj
Wary, careful, shrewd.
Uncommunicative; unwilling or hesitant to give information.
How often have the words
Argus-eyed
and
cagey
occurred in a corpus of books?
(source:
Google Ngram Viewer
)