To increase in number or value
Accumulate
To make worse or to anger or annoy
Aggravate
To save by using carefully
Conserve
To harm by contacting with something undesirable
Contaminate
To make or become smaller; reduce
Diminish
Severe; extreme
Drastic
Spending, coasting, or using more than is required
Extravagant
Careful in spending or using something
Frugal
Something that is harmful or dirty
Impurity
Something that is dangerous
Peril
Lasting or seeing to last for a long time or forever
Perpetual
A supply that can be used when there is a need
Resource
To replace something for another thing
Substitute
Necessary for continued life or prosperity
Vital