recreation
The rest of the day was entirely at his disposal for reading or recreation.
variation
The method relies on measuring how chemical variations in drinking water show up in people's hair.
evolution
It is said that Charles Darwin spent all his life on studying the theory of evolution.
option
In many areas, the East Coast especially, recycling is already the least expensive waste-management option.
pension
Over the past seven years, I have lost my pension, have taken two pay cuts and every year pay more for health insurance.
region
The streams, lakes, meadows, mountain ridges and forests have attracted more people to the region.
application
I spend so much time polishing my letter of application.
attention
However, the banking crisis and recession has drawn attention to failures in the governance of financial institutions.
harness
The Yellow River is being polluted severely.
The Chinese government should take some effective measures to harness the river.