Related Clues:
- Reliable; not hollow
- Hard soil broken by daughter
- Thus cover is substantial
- Water : liquid :: ice : ___
- Strongly made or built
- 3D shape
- Firm, reliable
- Humming after crossword essentially well-constructed
- Hard hat accordingly put on
- Favor, informally
- Strongly made
- Hardly iffy
- Strong; reliable
- Of a single color
- Ice's state of matter