What are the best answers for “having a hard back or cover”?

hardback, hardbound, hardcover.

How many letters does the top answer for “having a hard back or cover” have?

The most common answer is hardback (8 letters).

3 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

hardback 8 letters wn-def

a book with cardboard or cloth or leather covers

hardbound 9 letters wn-def

having a hard back or cover

hardcover 9 letters wn-def

a book with cardboard or cloth or leather covers