Is Hardbound a Adjective?

HARDBOUND (adjective) American English definition and synonyms | Macmillan Dictionary.

What does hardbound mean?

adjective. (of a book) bound with a stiff cover, usually of cloth or leather; casebound.

Is fictitious a noun or adjective?

created, taken, or assumed for the sake of concealment; not genuine; false: fictitious names. of, relating to, or consisting of fiction; imaginatively produced or set forth; created by the imagination: a fictitious hero.