Softbound is a synonym of paperback.
In of a book terms the difference between paperback and softbound
is that paperback is having flexible binding while softbound is with a cover of flexible paper rather than a rigid cardboard cover.
As a noun paperback
is a book with flexible binding.
paperback
Noun
(
en noun)
A book with flexible binding.
Adjective
(-)
(of a book) Having flexible binding.
Synonyms
* paperbacked, paperbound, softcovered
See also
* hardback
softbound
English
Adjective
(-)
(of a book) With a cover of flexible paper rather than a rigid cardboard cover.
Synonyms
* paperback
Antonyms
* hardback
* hardcovered