| A | B |
| elastic | having the quality of returning to its original size, shape, or position after being stretched, squeezed, bent, etc. |
| elasticity | elastic quality |
| detect | discover (a person) in the performance of some act |
| detection | a finding out; discovery |
| alternate | placed or occurring by turns; first one and then the other |
| alternative | choice from among two or more things |
| economy | management of affairs and resources of a country, area, or business |
| economics | science of the production, distribution, and consumption of resources of a country, area, or business |
| normal | the usual standard; regular; usual |
| normality | regular condition |
| concentrate | bring together in one place; pay close attention; focus the mind |
| concentration | close attention; amount of substance contained in a given quantity of a solution or mixture |
| initiate | the first one to start; get going; begin |
| initiative | active part in taking the first steps in any undertaking |
| restore | bring back; establish again |
| restoration | establishing again; a bringing back to a former condition |
| evaluate | find out the value or the amount of; estimate the worth or importance of; appraise |
| evaluation | appraisal or estimation as tot he quality, importance, value, or progess of one's work |
| office | a place in which the work of a position is done |
| official | having authority; authoritative |
| distinct | not the same; separate |
| distinction | making a difference; special quality or feature |
| confiscate | seize for the public treasury |
| confiscation | a seizing or a being seized |
| contaminate | make impure by contact; defile |
| contamination | pollution; impurity |