| A | B |
| ballast | heavy material used to make a ship steady or control the rising and falling of a vessel like a balloon |
| buoyant | able to float |
| buoyant | cheerful and carefree |
| clamber | to climb awkwardly |
| detach | to separate from |
| detach | not connected |
| detach | lacking concern or not taking sides |
| eerie | causing uneasiness |
| eerie | strange or mysterious |
| fathom | a length of six feet used in measuring depth of water |
| fathom | to figure out or to understand |
| pique | to arouse or excite |
| pique | a feeling of resentment caused by being ignored or insulted |
| probe | to poke or prod |
| probe | to examine closely |
| probe | a thorough investigation |
| realize | to be aware of |
| realize | to bring into being or to make happen |
| rupture | to split or break |
| rupture | a breaking or tearing apart by force |
| rupture | the breaking of a friendly relationship |
| sphere | a ball or globe |
| sphere | an area of power or influence |
| submerge | to go underwater |
| submerge | to put underwater or to cover with water |
| tedious | seeming to go on for a long time |
| tedious | boring |
| ultimate | final or maximum |
| ultimate | the greatest possible |
| unscathed | completely unharmed |