killas /kilˈəs/ (geology)

Clay-slate

• heame
• heap
• heap coals of fire on someone's head
• heaped
• heapier
• heapiest
• heaping
• heaps
• heapstead
• heapsteads
• heapy
• hear
• heard
• heare
• hearer
• hearers
• hear, hear
• hearie
• hearing
• hearing aid
• hearing aids
• hearing dog
• hearing dogs
• hearing-impaired
• hearings