Across
- 4. existing only in the imagination
- 5. as an alternative or substitute
- 6. forming a necessary base or core; of central importance
- 8. the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations
- 9. a device for making and breaking the connection in an electric circuit
Down
- 1. follow (someone or something) in order to catch or attack them
- 2. a book listing individuals or organizations alphabetically or thematically with details such as names, addresses, and telephone numbers
- 3. a poisonous substance secreted by animals such as snakes, spiders, and scorpions and typically injected into prey or aggressors by biting or stinging
- 6. a military stronghold, especially a strongly fortified town fit for a large garrison
- 7. state that one refuses to admit the truth or existence of