Matching Pairs Butting HeadsOnline version ........ by Tea Cher 1 Bashing 2 Creature 3 Relative 4 Unusual 5 Sturdy 6 Bones 7 Helmet 8 Fossilized 9 Ancient 10 Million years 11 Layer 12 Butting heads hard parts of the body that make up the skeleton. fighting or arguing very old, often dating back to a time before recorded history. hard hat that is worn on the head to protect it from injury thin sheet of something, such as rock, soil, or clothing. not common or expected. 1,000,000 years strong and not easily broken. a person who is related to you, such as a parent, child, sibling, or cousin. hitting something repeatedly with force. any living thing, such as an animal or a plant. Plant or animal remains that are turned into stone