RichThesaurus
cold-hearted
vs
stonehearted
cold-hearted
adj
Without sympathy, feeling or compassion; callous or heartless
stonehearted
adj
Hardhearted; pitiless; unfeeling.
How often have the words
cold-hearted
and
stonehearted
occurred in a corpus of books?
(source:
Google Ngram Viewer
)