| A heavy dull sound |
THUD |
| A metal-bearing mineral |
ORE |
| Advances in a process |
Developments |
| Beasts of burden |
DONKEYS |
| Corrode |
RUST |
| Equipment |
KIT |
| Financial obligations |
DEBTS |
| Form of water |
ICE |
| Hot drink |
TEA |
| Instructor |
TEACHER |
| Interrogate |
QUESTION |
| Large thick-skinned herbivore |
HIPPOPOTAMUS |
| Lookouts |
SENTRIES |
| Military force |
ARMY |
| More pleasant |
NICER |
