Enter a clue or pattern or both:
The Clue
Hardcover covers (7 letter answer)
The Answer
JACKETS
Tags
Notes
The answer JACKETS is so rare that it appears less than once every 2500 puzzles.
Definition
JACKET as a noun:
1. a short coat
2. an outer wrapping or casing; "phonograph records were sold in cardboard jackets"
3. (jacket crown, jacket) = (dentistry) an artificial crown fitted over a broken or decayed tooth
4. the outer skin of a potato
5. the tough metal shell casing for certain kinds of ammunition
JACKET as a verb:
1. provide with a thermally non-conducting cover; "The tubing needs to be jacketed"
2. put a jacket on; "The men were jacketed"