| Answer | Crossword Clue |
|---|---|
| strengthener | something that strengthens |
| strengtheners | STRENGTHENER, something that strengthens |
| backings | A layer of material that forms, protects, or strengthens the back of something |
| backing | A layer of material that forms, protects, or strengthens the back of something |
| REBAR | Steel rod that strengthens concrete |
| PLANK | Yoga pose that strengthens the abs |
| PLANK | Exercise position that strengthens the abs |
| ferrels | A ring or cap, typically a metal one, that strengthens the end of a handle, stick, or tube and prevents it from splitting or wearing |
