RichThesaurus
peregrine falcon
vs
peregrine hawk
peregrine falcon
noun
A medium-sized, very swift falcon, Falco peregrinus, that hunts small birds.
peregrine hawk
noun
The peregrine falcon.
How often have the words
peregrine falcon
and
peregrine hawk
occurred in a corpus of books?
(source:
Google Ngram Viewer
)