| Answer | Crossword Clue |
|---|---|
| DENSE | Highly concentrated |
| INTENSIVE | Highly concentrated |
| intensest | (of an action) Highly concentrated |
| toners | highly concentrated organic pigment containing little or no inert matter |
| toner | highly concentrated organic pigment containing little or no inert matter |
| nitrocellulose | A highly flammable material made by treating cellulose with concentrated nitric acid, used to make explosives and celluloid |
