"coals" in the noun sense
fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period
2. ember, coal
a hot fragment of wood or coal that is left from a fire and is glowing or smoldering
"coals" in the verb sense
1. char, coal
burn to charcoal
"Without a drenching rain, the forest fire will char everything"
supply with coal
take in coal
"The big ship coaled"
Source: WordNet® (An amazing lexical database of English)
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