Fume
Part of speech: noun
Definition: A gas or vapour/vapor that smells strongly or is dangerous to inhale. Fumes are solid particles formed by condensation from the gaseous state, e.g. metal oxides from volatilized metals. They can flocculate and coalesce. Their particle size is between 0.1 and 1 micron. (A micron is one millionth of a metre) A material that has been vaporized from the solid state to the gas state and re-coalesced to the solid state.
Part of speech: verb
Definition: Emit fumes. Expose something (especially wood) to ammonia fumes in order to produce dark tints. To feel or express great anger.
Vapor
Part of speech: noun
Definition: Cloudy diffused matter such as mist, steam or fumes suspended in the air.The gaseous state of a substance that is normally a solid or liquid.
Part of speech: verb
Definition: To become vapor; to be emitted or circulated as vapor.To turn into vapor.To use insubstantial language; to boast or bluster.