| A | B |
| bulkhead | a framework with a sloping door giving access to a cellar |
| demeanor | an expression or reaction |
| invincible | not able to be beaten or defeated |
| limitation | the state of being limited |
| ornithopter | an experimental device propelled by flapping wings (a mechanical bird) |
| sobriquet | a nickname |
| alternative | other |
| compass | a device that uses magnetism to aim a needle north |
| megaphone | a cone-shaped device used to increase teh sound of a voice |
| perspective | point of view |
| clause | a group of words that contain a subject and a verb |
| depedent clause | group of wors that does not express a complete thought and cannot stand alone as a sentence |
| independent clause | group of words that does express a complete thought and can stand alone as a sentence |
| simple sentence | contains 1 independent clause and no dependent clauses |
| compound sentence | contains 2 or more independent clauses and no dependent clauses |
| complex sentence | contains 1 independent clause and 1 or more dependent clauses |
| compound-complex sentence | contains 2 or more independent clauses and 1 or more dependent clauses |
| vacant | not occupied or empty |
| fiend | evil spirit or demon |