The plural of combustibility; multiple instances or types of the quality of being capable of catching fire.
From 'combustible' plus the suffix '-ity' (indicating a quality or state) and the plural '-ies.' This word stacks multiple levels of Latin and English morphology to indicate various flammability properties.
Different materials have wildly different combustibilities—wood ignites at 300°C but magnesium won't until 650°C, yet burns far more violently. The plural form lets scientists discuss why some fuels are 'more flammable' than others in a single word.
Complete word intelligence in one call. Free tier — 50 lookups/day.