"combustions" in the noun sense
1. combustion, burning
a process in which a substance reacts with oxygen to give heat and light
2. combustion
a state of violent disturbance and excitement
"combustion grew until revolt was unavoidable"
3. burning, combustion
the act of burning something
"the burning of leaves was prohibited by a town ordinance"
Source: WordNet® (An amazing lexical database of English)
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