| A | B |
| adjacent | next to; having a common border with (adj.) |
| associate | to join as a partner; to relate to (v.); partner; colleague; joined with others usually in work (n.) |
| component | element or part (n.); serving as one part of a whole (adj.) |
| cycle | series of events that recur regularly (n.) |
| effect | influence; result; meaning (n.) |
| export | product moved from one country to another (n.); to send out (v.) |
| hydrological | relating to the study of water (adj.) |
| incessant | constant; ceaseless (adj.) |
| integral | essential; whole (adj.) |
| nutrient | nourishing (adj.); nourishing food element (n.) |
| recurrence | something that happens again (n.) |
| restoration | process of bringing back to a former condition (n.) |
| retain | to keep; to remember (v.) |
| sediment | matter that settles to the bottom of a liquid (n.) |
| simultaneous | occuring at the same time (adj.) |
| stimulate | to animate; to spur on; to provoke (v.) |
| subtle | delicate; hard to detect (adj.) |
| tributary | stream or river feeding into a larger body of water (n.); flowing or being channeled into a larger body; paying tribute (adj.) |
| velocity | speed (n.) |
| watershed | area drained by a river system; an important turning point (n.) |