As nouns the difference between hardback and hardhack
is that hardback is a book with a solid binding while hardhack is a plant, the steeplebush.
As an adjective hardback
is (of a book) having a solid binding.
hardback
Noun
(
en noun)
A book with a solid binding.
Adjective
(-)
(of a book) Having a solid binding.
Synonyms
* hardcover
See also
* paperback
hardhack
English
Noun
A plant, the steeplebush.