| A | B |
|---|
| accumulate | to increase in mumber or amount |
| accumulate | to pile up or collect |
| accumulation | a pile or collection of something |
| aggravate | to make worse |
| aggravate | to anger or annoy |
| aggravation | annoyance; exasperation |
| conserve | to save by using carefully |
| conservation | the saving or protection of something |
| contaminate | to harm by contact with something undesirable |
| contamination | the act of or result of harming something |
| diminish | to make or become smaller |
| diminish | to reduce |
| drastic | severe; extreme |
| extravagant | spending, costing, or using more than is required |
| extravagance | the quality of being wasteful |
| extravagance | a thing that costs more than one has |
| frugal | careful in spending or using something |
| impurity | something that is harmful or dirty |
| peril | danger; something that is dangerous |
| imperil | to place in danger |
| perilous | dangerous |
| perpetual | lasting or seeming to last forever |
| perpetual | continuous |
| resource | a supply that can be used when there is a need |
| resourceful | able to deal with difficult problems |
| substitute | to replace one thing or person with another |
| substitute | a person or thing that replaces |
| substitute | acting in the place of someone or something else |
| sustain | to keep up; to support |
| sustain | to suffer; to undergo |
| vital | necessary for continued life or prosperity |
| vital | full of lively spirit |
| vital | of the greatest importance |
