| flammable liquid | 9.08 | Highly flammable liquid. | ||
| flammable material | 4.08 | Of course, keep that bulb away from flammable material. | ||
| flammable gas | 1.45 | Hydrogen is a highly flammable gas. | ||
| flammable substance | 1.25 | All are extremely flammable substances with vapors that can cause dizziness and suffocation. | ||
| flammable chemical | 1.12 | Other than that, he said, he was unaware of any flammable chemicals in the building. | ||
| flammable fuel | 0.59 | The planes were each on cross-continental routes, and thus carrying a heavy load of flammable fuel. | ||
| flammable hydrogen | 0.39 | It had been flying from Germany, kept aloft by highly flammable hydrogen gas. | ||
| flammable vapor | 0.39 | The safety board has focused on ways to reduce flammable vapors in the tanks. |