| Answer | Crossword Clue |
|---|---|
| ultrasonics | The science and application of ultrasonic waves |
| phonochemistry | the branch of chemistry concerned with the chemical effects of sound and ultrasonic waves |
| pyrotechny | the use and application of fire in science and the arts |
| pyrotechnies | PYROTECHNY, the use and application of fire in science and the arts |
| geotechnology | the application of science and technology to the extraction and use of the earth's natural resources |
| geotechnologies | GEOTECHNOLOGY, the application of science and technology to the extraction and use of the earth's natural resources |
