The period of geological time from 441 to 413 million year ago, characterized by the first appearance of fish and the land plants.
circus
citizen
classroom
college
consist
continent
conversation
courage
cowboy
creature
differ
depend
discovery
disease
Dutch
entirely
environment
exclaimed
factor
account
allow
anywhere
audience
attached
bare
begun
biggest
blank
breathing
butter
carbon
chain
cheese
forgot
forgotten
fuel
furniture
gentle
globe
grandfather
greatly
helpful
honor
husband
involved
Japan
